| Library | Web site | Town/City | County | Friends-group link | Consortium |
| Abington Public Library | | Abington | Plymouth | | OCLN |
| Acton Memorial Library | | Acton | Middlesex | | MLN |
| West Acton Citizens' Library | | Acton | Middlesex | | - |
| Russell Memorial Library | | Acushnet | Bristol | | SAILS |
| Adams Free Library | | Adams | Berkshire | | - |
| Agawam Public Library | | Agawam | Hampden | | - |
| Alford Library | | Alford | Berkshire | | - |
| Amesbury Public Library | | Amesbury | Essex | | MVLC |
| Jones Library, Inc. | | Amherst | Hampshire | | - |
| Memorial Hall Library | | Andover | Essex | | MVLC |
| Aquinnah Public Library | | Aquinnah | Dukes | | CLAMS |
| Robbins Library | | Arlington | Middlesex | | MLN |
| Stevens Memorial Library | | Ashburnham | Worcester | | - |
| Ashby Free Public Library | | Ashby | Middlesex | | - |
| Belding Memorial Library | | Ashfield | Franklin | | - |
| Ashland Public Library | | Ashland | Middlesex | | MLN |
| Athol Public Library | | Athol | Worcester | | - |
| Attleboro Public Library | | Attleboro | Bristol | | - |
| Auburn Public Library | | Auburn | Worcester | | - |
| Avon Public Library | | Avon | Norfolk | | OCLN |
| Ayer Public Library | | Ayer | Middlesex | | - |
| Centerville Public Library | | Barnstable - Centerville | Barnstable | | CLAMS |
| Cotuit Library | | Barnstable - Cotuit | Barnstable | | CLAMS |
| Hyannis Public Library Association | | Barnstable - Hyannis | Barnstable | | CLAMS |
| Marstons Mills Public Library | | Barnstable - Marstons Mills | Barnstable | | CLAMS |
| Osterville Village Library | | Barnstable - Osterville | Barnstable | | CLAMS |
| Sturgis Library | | Barnstable - Barnstable | Barnstable | | CLAMS |
| Whelden Memorial Library | | Barnstable - West Barnstable | Barnstable | | CLAMS |
| Woods Memorial Library | | Barre | Worcester | | - |
| Becket Athenaeum, Inc. | | Becket | Berkshire | | - |
| Bedford Free Public Library | | Bedford | Middlesex | | MLN |
| Clapp Memorial Library | | Belchertown | Hampshire | | - |
| Bellingham Public Library | | Bellingham | Norfolk | | - |
| Belmont Public Library | | Belmont | Middlesex | | MLN |
| Berkley Public Library | | Berkley | Bristol | | SAILS |
| Berlin Public Library | | Berlin | Worcester | | - |
| Cushman Library | | Bernardston | Franklin | | - |
| Beverly Public Library | | Beverly | Essex | | NOBLE |
| Billerica Public Library | | Billerica | Middlesex | | MVLC |
| Blackstone Public Library | | Blackstone | Worcester | | - |
| Porter Memorial Library | | Blandford | Hampden | | - |
| Bolton Public Library | | Bolton | Worcester | | - |
| Boston Public Library | | Boston | Suffolk | | MBLN |
| Jonathan Bourne Public Library | | Bourne | Barnstable | | CLAMS |
| Sargent Memorial Library | | Boxborough | Middlesex | | - |
| Boxford Town Library | | Boxford | Essex | | MVLC |
| Boylston Public Library | | Boylston | Worcester | | - |
| Thayer Public Library | | Braintree | Norfolk | | OCLN |
| Brewster Ladies' Library | | Brewster | Barnstable | | CLAMS |
| Bridgewater Public Library | | Bridgewater | Plymouth | | - |
| Brimfield Public Library | | Brimfield | Hampden | | - |
| Brockton Public Library | | Brockton | Plymouth | | OCLN |
| Merrick Public Library | | Brookfield | Worcester | | - |
| Public Library of Brookline | | Brookline | Norfolk | | MLN |
| Buckland Public Library | | Buckland | Franklin | | - |
| Burlington Public Library | | Burlington | Middlesex | | MVLC |
| Cambridge Public Library | | Cambridge | Middlesex | | MLN |
| Canton Public Library | | Canton | Norfolk | | OCLN |
| Gleason Public Library | | Carlisle | Middlesex | | MVLC |
| Carver Public Library | | Carver | Plymouth | | - |
| Tyler Memorial Library | | Charlemont | Franklin | | - |
| Charlton Public Library | | Charlton | Worcester | | - |
| Eldredge Public Library | | Chatham | Barnstable | | CLAMS |
| South Chatham Public Library | | Chatham | Barnstable | | - |
| Chelmsford Public Library | | Chelmsford | Middlesex | | MVLC |
| Chelsea Public Library | | Chelsea | Suffolk | | MBLN |
| Cheshire Public Library | | Cheshire | Berkshire | | - |
| Hamilton Memorial Library | | Chester | Hampden | | - |
| Chesterfield Public Library | | Chesterfield | Hampshire | | - |
| Chicopee Public Library | | Chicopee | Hampden | | - |
| Chilmark Free Public Library | | Chilmark | Dukes | | CLAMS |
| Clarksburg Town Library | | Clarksburg | Berkshire | | - |
| Bigelow Free Public Library | | Clinton | Worcester | | - |
| Paul Pratt Memorial Library | | Cohasset | Norfolk | | OCLN |
| Griswold Memorial Library | | Colrain | Franklin | | - |
| Concord Free Public Library | | Concord | Middlesex | | MLN |
| Field Memorial Library | | Conway | Franklin | | - |
| Bryant Free Library | | Cummington | Hampshire | | - |
| Dalton Free Public Library | | Dalton | Berkshire | | - |
| Peabody Institute Library | | Danvers | Essex | | NOBLE |
| Dartmouth Public Libraries | | Dartmouth | Bristol | | - |
| Dedham Public Library | | Dedham | Norfolk | | MLN |
| Tilton Library | | Deerfield | Franklin | | - |
| Dennis Memorial Library Association | | Dennis - Dennis | Barnstable | | CLAMS |
| Dennis Public Library | | Dennis - Dennis Port | Barnstable | | CLAMS |
| Jacob Sears Memorial Library | | Dennis - East Dennis | Barnstable | | CLAMS |
| South Dennis Free Public Library | | Dennis - South Dennis | Barnstable | | CLAMS |
| West Dennis Free Public Library | | Dennis - West Dennis | Barnstable | | CLAMS |
| Dighton Public Library | | Dighton | Bristol | | - |
| Simon Fairfield Public Library | | Douglas | Worcester | | - |
| Dover Town Library | | Dover | Norfolk | | MLN |
| Moses Greeley Parker Memorial Library | | Dracut | Middlesex | | MVLC |
| Pearle L. Crawford Memorial Library | | Dudley | Worcester | | - |
| Dunstable Free Public Library | | Dunstable | Middlesex | | MVLC |
| Duxbury Free Library | | Duxbury | Plymouth | | OCLN |
| East Bridgewater Public Library | | East Bridgewater | Plymouth | | - |
| East Brookfield Public Library | | [East Brookfield, Massachusetts|Brookfield, Massachusetts|East Brookfield] | Worcester | | - |
| East Longmeadow Public Library | | [East Longmeadow, Massachusetts|Longmeadow, Massachusetts|East Longmeadow] | Hampden | | - |
| Eastham Public Library | | Eastham | Barnstable | | CLAMS |
| Emily Williston Memorial Library | | Easthampton | Hampshire | | - |
| Ames Free Library | | Easton | Bristol | | - |
| Edgartown Free Public Library | | Edgartown | Dukes | | CLAMS |
| Egremont Free Library | | Egremont | Berkshire | | - |
| Erving Public Library | | Erving | Franklin | | - |
| T.O.H.P. Burnham Free Library | | Essex | Essex | | MVLC |
| Everett Public Libraries | | Everett | Middlesex | | NOBLE |
| Millicent Library | | Fairhaven | Bristol | | - |
| Fall River Public Library | | Fall River | Bristol | | - |
| Falmouth Public Library | | Falmouth | Barnstable | | CLAMS |
| West Falmouth Library | | Falmouth - West Falmouth | Barnstable | | CLAMS |
| Woods Hole Public Library | | Falmouth - Woods Hole | Barnstable | | CLAMS |
| Fitchburg Public Library | | Fitchburg | Worcester | | - |
| Florida Free Library | | Florida | Berkshire | | - |
| Boyden Library | | Foxborough | Norfolk | | - |
| Framingham Public Library | | Framingham | Middlesex | | MLN |
| Franklin Public Library | | Franklin | Norfolk | | MLN |
| Guilford H. Hathaway Library | | Freetown - Assonet | Bristol | | SAILS |
| James White Memorial Library | | Freetown - East Freetown | Bristol | | SAILS |
| Levi Heywood Memorial Library | | Gardner | Worcester | | - |
| Peabody Library | | Georgetown | Essex | | MVLC |
| Slate Memorial Library | | Gill | Franklin | | - |
| Gloucester Lyceum & Sawyer Free Library | | Gloucester | Essex | | NOBLE |
| Goshen Free Public Library | | Goshen | Hampshire | | - |
| Cuttyhunk Public Library | | Gosnold | Dukes | | - |
| Grafton Public Library | | Grafton | Worcester | | - |
| Granby Free Public Library | | Granby | Hampshire | | - |
| Granville Public Library | | Granville | Hampden | | - |
| Great Barrington Libraries | | Great Barrington | Berkshire | | - |
| Greenfield Public Library | | Greenfield | Franklin | | - |
| Groton Public Library | | Groton | Middlesex | | MVLC |
| Langley-Adams Library | | Groveland | Essex | | MVLC |
| Goodwin Memorial Library | | Hadley | Hampshire | | - |
| Holmes Public Library | | Halifax | Plymouth | | - |
| Hamilton-Wenham Public Library | | Hamilton | Essex | | MVLC |
| Hampden Free Public Library | | Hampden | Hampden | | - |
| Taylor Memorial Library | | Hancock | Berkshire | | - |
| John Curtis Free Library | | Hanover | Plymouth | | OCLN |
| Hanson Public Library | | Hanson | Plymouth | | - |
| Gilbertville Public Library | | Hardwick | Worcester | | - |
| Paige Memorial Library | | Hardwick | Worcester | | - |
| Harvard Public Library | | Harvard | Worcester | | - |
| Harwich Port Library Association | | Harwich | Barnstable | | - |
| Brooks Free Library | | Harwich | Barnstable | | CLAMS |
| Chase Library Assoc., Inc. | | Harwich | Barnstable | | - |
| Hatfield Public Library | | Hatfield | Hampshire | | - |
| Haverhill Public Library | | Haverhill | Essex | | MVLC |
| Heath Free Public Library | | Heath | Franklin | | - |
| Hingham Public Library | | Hingham | Plymouth | | OCLN |
| Hinsdale Public Library | | Hinsdale | Berkshire | | - |
| Holbrook Public Library | | Holbrook | Norfolk | | OCLN |
| Gale Free Library | | Holden | Worcester | | - |
| Holland Public Library | | Holland | Hampden | | - |
| Holliston Public Library | | Holliston | Middlesex | | MLN |
| Holyoke Public Library | | Holyoke | Hampden | | - |
| Bancroft Memorial Library | | Hopedale | Worcester | | - |
| Hopkinton Public Library | | Hopkinton | Middlesex | | - |
| Hubbardston Public Library | | Hubbardston | Worcester | | - |
| Hudson Public Library | | Hudson | Middlesex | | - |
| Hull Public Library | | Hull | Plymouth | | OCLN |
| Huntington Public Library | | Huntington | Hampshire | | - |
| Ipswich Public Library | | Ipswich | Essex | | MVLC |
| Kingston Public Library | | Kingston | Plymouth | | OCLN |
| Lakeville Free Public Library | | Lakeville | Plymouth | | SAILS |
| Thayer Memorial Library | | Lancaster | Worcester | | - |
| Lanesborough Public Library | | Lanesborough | Berkshire | | - |
| Lawrence Public Library | | Lawrence | Essex | | MVLC |
| Lee Library Association | | Lee | Berkshire | | - |
| Leicester Public Library | | Leicester | Worcester | | - |
| Lenox Library Association | | Lenox | Berkshire | | - |
| Leominster Public Library | | Leominster | Worcester | | - |
| Leverett Library | | Leverett | Franklin | | - |
| Cary Memorial Library | | Lexington | Middlesex | | MLN |
| Robertson Memorial Library | | Leyden | Franklin | | - |
| Lincoln Public Library | | Lincoln | Middlesex | | MLN |
| Reuben Hoar Library | | Littleton | Middlesex | | MVLC |
| Richard Salter Storrs Library | | Longmeadow | Hampden | | - |
| Samuel S. Pollard Memorial Library | | Lowell | Middlesex | | MVLC |
| Hubbard Memorial Library | | Ludlow | Hampden | | - |
| Lunenburg Public Library | | Lunenburg | Worcester | | - |
| Lynn Public Library | | Lynn | Essex | | NOBLE |
| Lynnfield Public Library | | Lynnfield | Essex | | NOBLE |
| Malden Public Library | | Malden | Middlesex | | MBLN |
| Manchester-by-the-Sea Public Library | | Manchester-by-the-Sea | Essex | | MVLC |
| Mansfield Public Library | | Mansfield | Bristol | | - |
| Abbot Public Library | | Marblehead | Essex | | NOBLE |
| Elizabeth Taber Library | | Marion | Plymouth | | - |
| Marlborough Public Library | | Marlborough | Middlesex | | - |
| Ventress Memorial Library | | Marshfield | Plymouth | | OCLN |
| Mashpee Public Library | | Mashpee | Barnstable | | CLAMS |
| Mattapoisett Free Public Library | | Mattapoisett | Plymouth | | SAILS |
| Maynard Public Library | | Maynard | Middlesex | | MLN |
| Medfield Public Library | | Medfield | Norfolk | | MLN |
| Medford Public Library | | Medford | Middlesex | | MLN |
| Medway Public Library | | Medway | Norfolk | | MLN |
| Melrose Public Library | | Melrose | Middlesex | | NOBLE |
| Taft Public Library | | Mendon | Worcester | | - |
| Merrimac Public Library | | Merrimac | Essex | | MVLC |
| Nevins Memorial Library | | Methuen | Essex | | MVLC |
| Middleborough Public Library | | Middleborough | Plymouth | | - |
| Middlefield Public Library | | Middlefield | Hampshire | | - |
| Flint Public Library | | Middleton | Essex | | MVLC |
| Milford Town Library | | Milford | Worcester | | - |
| Millbury Public Library | | Millbury | Worcester | | - |
| Millis Public Library | | Millis | Norfolk | | MLN |
| Millville Free Public Library | | Millville | Worcester | | - |
| Milton Public Library | | Milton | Norfolk | | OCLN |
| Monroe Public Library | | Monroe | Franklin | | - |
| Monson Free Library and Reading Room Association | | Monson | Hampden | | - |
| Montague Public Libraries: Carnegie Public Library | | Montague | Franklin | | - |
| Monterey Library | | Monterey | Berkshire | | - |
| Grace Hall Memorial Library | | Montgomery | Hampden | | - |
| Mount Washington Library | | Mount Washington | Berkshire | | - |
| Nahant Public Library | | Nahant | Essex | | - |
| Nantucket Atheneum | | Nantucket | Nantucket | | CLAMS |
| Bacon Free Library | | Natick | Middlesex | | MLN |
| Morse Institute Library | | Natick | Middlesex | | MLN |
| Needham Free Public Library | | Needham | Norfolk | | MLN |
| New Bedford Free Public Library | | [New Bedford, Massachusetts|Bedford, Massachusetts|New Bedford] | Bristol | | SAILS |
| Leroy Pollard Memorial Library | | New Braintree | Worcester | | - |
| New Marlborough Town Library | | New Marlborough | Berkshire | | - |
| New Salem Public Library | | [New Salem, Massachusetts|Salem, Massachusetts|New Salem] | Franklin | | - |
| Newbury Town Library | | Newbury | Essex | | MVLC |
| Newburyport Public Library | | Newburyport | Essex | | MVLC |
| Newton Free Library | | Newton | Middlesex | | MLN |
| Norfolk Public Library | | Norfolk | Norfolk | | - |
| North Adams Public Library | | North Adams | Berkshire | | - |
| Stevens Memorial Library | | North Andover | Essex | | MVLC |
| Richards Memorial Library | | North Attleborough | Bristol | | - |
| Haston Free Public Library | | North Brookfield | Worcester | | - |
| Ames Free Library | | North Easton | Bristol | | - |
| Flint Memorial Library | | North Reading | Middlesex | | MVLC |
| Northborough Free Library | | Northborough | Worcester | | - |
| Whitinsville Social Library | | Northbridge | Worcester | | - |
| Dickinson Memorial Library | | Northfield | Franklin | | - |
| Field Library | | Northfield | Franklin | | - |
| Forbes Library | | Northampton | Hampshire | | - |
| Lilly Library | | Northampton | Hampshire | | - |
| Norton Public Library | | Norton | Bristol | | - |
| Norwell Public Library | | Norwell | Plymouth | | OCLN |
| Morrill Memorial Library | | Norwood | Norfolk | | MLN |
| Oak Bluffs Public Library | | Oak Bluffs | Dukes | | CLAMS |
| Fobes Memorial Library | | Oakham | Worcester | | - |
| Wheeler Memorial Library | | Orange | Franklin | | - |
| Snow Library | | Orleans | Barnstable | | CLAMS |
| Otis Library and Museum | | Otis | Berkshire | | - |
| Oxford Free Public Library | | Oxford | Worcester | | - |
| Palmer Public Library | | Palmer | Hampden | | - |
| Richards Memorial Library | | Paxton | Worcester | | - |
| Peabody Institute Library | | Peabody | Essex | | NOBLE |
| Pelham Library | | Pelham | Hampshire | | - |
| Pembroke Public Library | | Pembroke | Plymouth | | - |
| Pepperell: Lawrence Library | | Pepperell | Middlesex | | - |
| Peru Library | | Peru | Berkshire | | - |
| Petersham Memorial Library | | Petersham | Worcester | | - |
| Phillips Free Public Library | | Phillipston | Worcester | | - |
| Berkshire Athenaeum | | Pittsfield | Berkshire | | - |
| Shaw Memorial Library | | Plainfield | Hampshire | | - |
| Plainville Public Library | | Plainville | Norfolk | | - |
| Plymouth Public Library | | Plymouth | Plymouth | | OCLN |
| Plympton Public Library | | Plympton | Plymouth | | - |
| Princeton Public Library | | Princeton | Worcester | | - |
| Provincetown Public Library | | Provincetown | Barnstable | | CLAMS |
| Thomas Crane Public Library | | Quincy | Norfolk | | OCLN |
| Turner Free Library | | Randolph | Norfolk | | OCLN |
| Raynham Public Library | | Raynham | Bristol | | - |
| Reading Public Library | | Reading | Middlesex | | NOBLE |
| Blanding Free Public Library | | Rehoboth | Bristol | | - |
| Revere Public Library | | Revere | Suffolk | | NOBLE |
| Richmond Free Public Library | | Richmond | Berkshire | | - |
| Joseph H. Plumb Memorial Library | | Rochester | Plymouth | | - |
| Rockland Memorial Library | | Rockland | Plymouth | | OCLN |
| Rockport Public Library | | Rockport | Essex | | MVLC |
| Rowe Town Library | | Rowe | Franklin | | - |
| Rowley Public Library | | Rowley | Essex | | MVLC |
| Phinehas S. Newton Library | | Royalston | Worcester | | - |
| Russell Public Library | | Russell | Hampden | | - |
| Rutland Free Public Library | | Rutland | Worcester | | - |
| Salem Public Library | | Salem | Essex | | NOBLE |
| Salisbury Public Library | | Salisbury | Essex | | MVLC |
| Sandisfield Free Public Library | | Sandisfield | Berkshire | | - |
| Sandwich Free Public Library | | Sandwich | Barnstable | | OCLN |
| Saugus Public Library | | Saugus | Essex | | NOBLE |
| Savoy Hollow Library | | Savoy | Berkshire | | - |
| Scituate Town Library | | Scituate | Plymouth | | OCLN |
| Seekonk Public Library | | Seekonk | Bristol | | - |
| Sharon Public Library | | Sharon | Norfolk | | OCLN |
| Bushnell-Sage Library | | Sheffield | Berkshire | | - |
| Shelburne Free Public Library | | Shelburne | Franklin | | - |
| Arms Library | | Shelburne | Franklin | | - |
| Sherborn Library | | Sherborn | Middlesex | | MLN |
| Hazen Memorial Library | | Shirley | Middlesex | | - |
| Shrewsbury Free Public Library | | Shrewsbury | Worcester | | - |
| M. N. Spear Memorial Library | | Shutesbury | Franklin | | - |
| Somerset Public Library | | Somerset | Bristol | | - |
| Somerville Public Library Central Library, [West Somerville, Massachusetts|Somerville Branch Library|West Branch] | | Somerville | Middlesex | | MLN |
| South Hadley Public Library | | [South Hadley, Massachusetts|Hadley, Massachusetts|South Hadley] | Hampshire | | - |
| Gaylord Memorial Library | | South Hadley | Hampshire | | - |
| Edwards Public Library | | Southampton | Hampshire | | - |
| Southborough Library | | Southborough | Worcester | | - |
| Jacob Edwards Library | | Southbridge | Worcester | | - |
| Southwick Public Library | | Southwick | Hampden | | - |
| Richard Sugden Public Library | | Spencer | Worcester | | - |
| Springfield City Library | | Springfield | Hampden | | - |
| Conant Public Library | | Sterling | Worcester | | - |
| Stockbridge Library Association | | Stockbridge | Berkshire | | - |
| Stoneham Public Library | | Stoneham | Middlesex | | NOBLE |
| Stoughton Public Library | | Stoughton | Norfolk | | OCLN |
| Randall Library | | Stow | Middlesex | | MLN |
| Joshua Hyde Public Library | | Sturbridge | Worcester | | - |
| Goodnow Library | | Sudbury | Middlesex | | MLN |
| Sunderland Public Library | | Sunderland | Franklin | | - |
| Sutton Free Public Library | | Sutton | Worcester | | - |
| Swampscott Public Library | | Swampscott | Essex | | NOBLE |
| Swansea Free Public Library | | Swansea | Bristol | | - |
| Taunton Public Library | | Taunton | Bristol | | - |
| Boynton Public Library | | Templeton | Worcester | | - |
| Tewksbury Public Library | | Tewksbury | Middlesex | | MVLC |
| Vineyard Haven Public Library | | Tisbury - Vineyard Haven | Dukes | | CLAMS |
| Tolland Public Library | | Tolland | Hampden | | - |
| Topsfield Town Library | | Topsfield | Essex | | MVLC |
| Townsend Public Library | | Townsend | Middlesex | | - |
| Truro Public Library | | Truro | Barnstable | | CLAMS |
| Tyngsborough Public Library | | Tyngsborough | Middlesex | | MVLC |
| Tyringham Free Public Library | | Tyringham | Berkshire | | - |
| Upton Town Library | | Upton | Worcester | | - |
| Uxbridge Free Public Library | | Uxbridge | Worcester | | - |
| Lucius Beebe Memorial Library | | Wakefield | Middlesex | | NOBLE |
| Wales Public Library | | Wales | Hampden | | - |
| Walpole Public Library | | Walpole | Norfolk | | OCLN |
| Waltham Public Library | | Waltham | Middlesex | | MLN |
| Young Men's Library Association | | Ware | Hampshire | | - |
| Wareham Free Library | | Wareham | Plymouth | | - |
| Warren Public Library | | Warren | Worcester | | - |
| West Warren Library Association | | Warren | Worcester | | - |
| Warwick Free Public Library | | Warwick | Franklin | | - |
| Watertown Free Public Library | | Watertown | Middlesex | | MLN |
| Wayland Free Public Library | | Wayland | Middlesex | | MLN |
| Chester C. Corbin Public Library | | Webster | Worcester | | - |
| Wellesley Free Library | | Wellesley | Norfolk | | MLN |
| Wellfleet Public Library | | Wellfleet | Barnstable | | CLAMS |
| Wendell Free Library | | Wendell | Franklin | | - |
| Beaman Memorial Public Library | | West Boylston | Worcester | | - |
| West Bridgewater Public Library | | West Bridgewater | Plymouth | | - |
| Merriam-Gilbert Public Library | | West Brookfield | Worcester | | - |
| G. A. R. Memorial Library | | West Newbury | Essex | | MVLC |
| West Springfield Public Library | | West Springfield | Hampden | | - |
| West Stockbridge Public Library | | West Stockbridge | Berkshire | | - |
| West Tisbury Free Public Library | | [West Tisbury, Massachusetts|Tisbury, Massachusetts|West Tisbury] | Dukes | | CLAMS |
| Westborough Public Library | | Westborough | Worcester | | - |
| Westfield Athenaeum | | Westfield | Hampden | | - |
| J. V. Fletcher Library | | Westford | Middlesex | | MVLC |
| Westhampton Memorial Library | | Westhampton | Hampshire | | - |
| Forbush Memorial Library | | Westminster | Worcester | | - |
| Weston Public Library | | Weston | Middlesex | | MLN |
| Westport Free Public Library | | Westport | Bristol | | - |
| Westwood Public Library | | Westwood | Norfolk | | MLN |
Weymouth Public Libraries
| | Weymouth | Norfolk | | OCLN |
| S. White Dickinson Memorial Library | | Whately | Franklin | | - |
| Whitman Public Library | | Whitman | Plymouth | | OCLN |
| Wilbraham Public Library | | Wilbraham | Hampden | | - |
| Meekins Library | | Williamsburg | Hampshire | | - |
| David and Joyce Milne Public Library | | Williamstown | Berkshire | | - |
| Wilmington Memorial Library | | Wilmington | Middlesex | | MVLC |
| Beals Memorial Library | | Winchendon | Worcester | | - |
| Winchester Public Library | | Winchester | Middlesex | | MLN |
| Windsor Free Public Library | | Windsor | Berkshire | | - |
| Winthrop Public Library | | Winthrop | Suffolk | | NOBLE |
| Woburn Public Library | | Woburn | Middlesex | | MLN |
| Worcester Public Library | | Worcester | Worcester | | - |
| Worthington Library | | Worthington | Hampshire | | - |
| Fiske Public Library | | Wrentham | Norfolk | | - |
| Yarmouth Port Library | | Yarmouth - Yarmouth Port | Barnstable | | CLAMS |
| Yarmouth Town Libraries [South Yarmouth, Massachusetts|Yarmouth Library (Massachusetts)|South Yarmouth], West Yarmouth | | Yarmouth | Barnstable | | CLAMS |