| Election | Constituency | Candidate | Votes | % share | Position |
| 1918 general election | Cardiff East | | 5,554 | 28.5 | 3 |
| 1918 general election | Derby | | 25,145 | 37.8 | 1 |
| 1918 general election | Manchester Ardwick | | 5,670 | 31.8 | 2 |
| 1918 general election | Middlesbrough West | | 5,350 | 32.8 | 2 |
| 1918 general election | Newcastle-upon-Tyne East | | 5,195 | 34.7 | 2 |
| 1918 general election | Reading | | 8,410 | 29.8 | 2 |
| 1918 general election | Wakefield | | 5,882 | 33.7 | 2 |
| 1918 general election | Warrington | | 5,377 | 22.6 | 3 |
| 1921 by-election | Dudley | | 10,244 | 50.7 | 1 |
| 1921 by-election | Heywood and Radcliffe | | 13,430 | 41.7 | 1 |
| 1922 general election | Bolton | | 20,156 | 15.8 | 4 |
| 1922 general election | Bristol East | | 13,759 | 49.7 | 2 |
| 1922 general election | Cardiff East | | 7,506 | 31.4 | 3 |
| 1922 general election | Derby | | 25,215 | 27.0 | 1 |
| 1922 general election | Dudley | | 8,522 | 39.8 | 2 |
| 1922 general election | Heywood and Radcliffe | | 15,334 | 44.6 | 2 |
| 1922 general election | Leeds South | | 13,210 | 53.7 | 1 |
| 1922 general election | Leyton East | | 6,300 | 30.9 | 2 |
| 1922 general election | Manchester Ardwick | | 14,031 | 52.3 | 1 |
| 1922 general election | Salford West | | 8,724 | 32.3 | 2 |
| 1922 general election | Wakefield | | 9,798 | 48.5 | 2 |
| 1922 general election | Wolverhampton East | | 3,076 | 12.2 | 3 |
| 1923 general election | Derby | | 24,887 | 29.0 | 1 |
| 1923 general election | Leeds South | | 11,705 | 44.2 | 1 |
| 1923 general election | Manchester Ardwick | | 15,673 | 60.4 | 1 |
| 1923 general election | Heywood and Radcliffe | | 15,273 | 47.1 | 2 |
| 1923 general election | Rushcliffe | | 6,882 | 24.7 | 3 |
| 1924 general election | Barkston Ash | | 11,894 | 41.4 | 2 |
| 1924 general election | Derby | | 27,423 | 25.7 | 1 |
| 1924 general election | Leeds South | | 12,799 | 46.3 | 1 |
| 1924 general election | Manchester Ardwick | | 15,941 | 54.9 | 1 |
| 1924 general election | Oldham | | 22,081 | 18.4 | 4 |
| 1924 general election | Paddington North | | 10,481 | 38.1 | 2 |
| 1924 general election | Wakefield | | 10,192 | 47.9 | 2 |
| 1928 by-election | Ashton-under-Lyne | | 9,567 | 40.6 | 1 |
| 1929 general election | Ashton-under-Lyne | | 13,170 | 44.4 | 1 |
| 1929 general election | Berwick-upon-Tweed | | 5,402 | 18.4 | 2 |
| 1929 general election | Bethnal Green South West | | 6,849 | 38.7 | 2 |
| 1929 general election | Clitheroe | | 15,592 | 39.5 | 2 |
| 1929 general election | Derby | | 39,688 | 30.0 | 1 |
| 1929 general election | Leeds South | | 18,043 | 52.5 | 1 |
| 1929 general election | Lonsdale | | 7,303 | 25.4 | 3 |
| 1929 general election | Manchester Ardwick | | 20,041 | 60.3 | 1 |
| 1929 general election | Oldham | | 32,727 | 25.0 | 2 |
| 1929 general election | Paddington North | | 13,348 | 39.3 | 2 |
| 1929 general election | Rossendale | | 14,624 | 36.0 | 1 |
| 1929 general election | Wakefield | | 13,393 | 48.8 | 1 |
| 1929 general election | Westbury | | 7,458 | 22.5 | 3 |
| 1929 general election | York | | 20,663 | 45.0 | 1 |
| 1931 by-election | Ashton-under-Lyne | | 11,005 | 39.4 | 2 |
| 1931 by-election | Manchester Ardwick | | 15,294 | 50.5 | 1 |
| 1931 general election | Ashton-under-Lyne | | 11,074 | 37.1 | 2 |
| 1931 general election | Leeds South | | 14,156 | 40.1 | 2 |
| 1931 general election | Manchester Ardwick | | 15,664 | 42.0 | 2 |
| 1931 general election | Middlesbrough West | | 13,040 | 33.4 | 2 |
| 1931 general election | Oldham | | 26,631 | | 4 |
| 1931 general election | Plymouth Sutton | | 14,073 | 36.7 | 2 |
| 1931 general election | Rossendale | | 11,135 | 27.5 | 3 |
| 1931 general election | Stalybridge and Hyde | | 14,251 | 28.1 | 2 |
| 1931 general election | Wakefield | | 11,774 | 42.6 | 2 |
| 1931 general election | York | | 16,310 | 35.1 | 2 |
| 1933 by-election | Rotherham | | 28,767 | 69.1 | 1 |
| 1935 by-election | Edinburgh West | | 10,462 | 33.9 | 2 |
| 1935 general election | Accrington | | 21,203 | 45.6 | 2 |
| 1935 general election | Barrow-in-Furness | | 17,919 | 49.7 | 2 |
| 1935 general election | Eccles | | 20,055 | 47.3 | 2 |
| 1935 general election | Gateshead | | 25,804 | 47.3 | 2 |
| 1935 general election | Leeds South | | 15,223 | 46.0 | 1 |
| 1935 general election | Manchester Ardwick | | 16,364 | 52.9 | 1 |
| 1935 general election | Middlesbrough West | | 12,764 | 33.7 | 2 |
| 1935 general election | Norwich | | 22,055 | 17.8 | 4 |
| 1935 general election | Plymouth Sutton | | 15,394 | 41.7 | 2 |
| 1935 general election | Pontefract | | 19,783 | 53.4 | 1 |
| 1935 general election | Rotherham | | 29,725 | 67.5 | 1 |
| 1935 general election | Salford North | | 15,272 | 43.4 | 2 |
| 1941 by-election | Pontefract | | unopposed | N/A | 1 |
| 1944 by-election | Sheffield Attercliffe | | unopposed | N/A | 1 |
| 1945 general election | Acton | | 19,950 | 56.1 | 1 |
| 1945 general election | Eccles | | 23,008 | 51.1 | 1 |
| 1945 general election | Exeter | | 15,245 | 40.2 | 2 |
| 1945 general election | Manchester Ardwick | | 14,360 | 64.0 | 1 |
| 1945 general election | Newcastle upon Tyne West | | 28,149 | 58.5 | 1 |
| 1945 general election | Pontefract | | 24,690 | 60.6 | 1 |
| 1945 general election | Rotherham | | 35,654 | 74.2 | 1 |
| 1945 general election | Salford North | | 18,327 | 60.5 | 1 |
| 1945 general election | Sheffield Attercliffe | | 23,468 | 81.4 | 1 |
| 1945 general election | South Derbyshire | | 47,586 | 57.7 | 1 |
| 1945 general election | The Hartlepools | | 16,502 | 41.2 | 1 |
| 1945 general election | The Wrekin | | 22,453 | 56.3 | 1 |
| 1945 general election | West Stirlingshire | | 16,066 | 54.4 | 1 |
| 1948 by-election | Glasgow Camlachie | | 10,690 | 42.1 | 2 |
| 1950 general election | Acton | | 21,751 | 49.1 | 1 |
| 1950 general election | Birmingham Perry Barr | | 23,178 | 56.6 | 1 |
| 1950 general election | Eccles | | 27,409 | 50.7 | 1 |
| 1950 general election | Manchester Wythenshawe | | 17,191 | 37.2 | 2 |
| 1950 general election | Newcastle upon Tyne West | | 31,230 | 58.2 | 1 |
| 1950 general election | Nottingham East | | 20,404 | 46.5 | 1 |
| 1950 general election | Sheffield Attercliffe | | 30,726 | 71.6 | 1 |
| 1950 general election | South East Derbyshire | | 30,039 | 49.1 | 1 |
| 1950 general election | The Hartlepools | | 25,609 | 50.6 | 1 |
| 1950 general election | The Wrekin | | 19,730 | 53.7 | 1 |
| 1950 general election | Westbury | | 15,766 | 35.6 | 2 |
| 1950 general election | West Stirlingshire | | 19,930 | 55.6 | 1 |
| 1951 general election | Acton | | 23,287 | 52.2 | 1 |
| 1951 general election | Birmingham Perry Barr | | 23,322 | 58.1 | 1 |
| 1951 general election | Eccles | | 27,941 | 52.5 | 1 |
| 1951 general election | Haltemprice | | 19,584 | 41.9 | 2 |
| 1951 general election | Newcastle upon Tyne West | | 31,765 | 57.9 | 1 |
| 1951 general election | Nottingham East | | 20,865 | 47.8 | 1 |
| 1951 general election | Sheffield Attercliffe | | 29,958 | 71.1 | 1 |
| 1951 general election | South East Derbyshire | | 33,020 | 52.7 | 1 |
| 1951 general election | The Hartlepools | | 27,147 | 52.6 | 1 |
| 1951 general election | The Wrekin | | 20,109 | 52.4 | 1 |
| 1951 general election | Westbury | | 17,623 | 39.2 | 2 |
| 1954 by-election | Haltemprice | | 9,974 | 38.2 | 2 |
| 1955 general election | Acton | | 20,645 | 50.6 | 1 |
| 1955 general election | Birmingham Perry Barr | | 18,732 | 51.0 | 1 |
| 1955 general election | Eccles | | 25,351 | 52.4 | 1 |
| 1955 general election | Newcastle upon Tyne West | | 25,401 | 55.7 | 1 |
| 1955 general election | Nottingham North | | 26,552 | 55.4 | 1 |
| 1955 general election | Sheffield Attercliffe | | 33,071 | 71.0 | 1 |
| 1955 general election | South East Derbyshire | | 25,620 | 51.6 | 1 |
| 1955 general election | South Northamptonshire | | 17,339 | 44.7 | 2 |
| 1955 general election | The Hartlepools | | 25,145 | 51.6 | 1 |
| 1955 general election | The Wrekin | | 18,541 | 49.4 | 2 |
| 1955 general election | Westbury | | 16,295 | 37.8 | 2 |
| 1958 by-election | St Helens | | 26,405 | 64.7 | 1 |
| 1959 general election | Acton | | 18,438 | 48.8 | 2 |
| 1959 general election | Birmingham Perry Barr | | 16,811 | 42.6 | 1 |
| 1959 general election | Darlington | | 19,901 | 39.7 | 2 |
| 1959 general election | Eccles | | 25,566 | 52.0 | 1 |
| 1959 general election | Newcastle upon Tyne West | | 28,956 | 54.8 | 1 |
| 1959 general election | St Helens | | 35,961 | 62.1 | 1 |
| 1959 general election | Sheffield Attercliffe | | 33,676 | 68.8 | 1 |
| 1959 general election | South East Derbyshire | | 25,362 | 45.5 | 2 |
| 1959 general election | The Hartlepools | | 25,281 | 49.8 | 2 |
| 1964 general election | Birmingham Perry Barr | | 18,156 | 49.5 | 2 |
| 1964 general election | Carlisle | | 19,169 | 45.6 | 1 |
| 1964 general election | Glasgow Springburn | | 16,828 | 65.3 | 1 |
| 1964 general election | Newcastle upon Tyne West | | 29,603 | 58.3 | 1 |
| 1964 general election | St Helens | | 34,137 | 67.0 | 1 |
| 1964 general election | Sheffield Attercliffe | | 30,318 | 66.8 | 1 |
| 1964 general election | Sunderland South | | 25,900 | 51.6 | 1 |
| 1966 general election | Carlton | | 24,589 | 39.2 | 2 |
| 1966 general election | Carlisle | | 22,565 | 56.1 | 1 |
| 1966 general election | Glasgow Central | | 11,673 | 74.8 | 1 |
| 1966 general election | Glasgow Springburn | | 15,998 | 67.8 | 1 |
| 1966 general election | Nottingham South | | 24,580 | 50.3 | 1 |
| 1966 general election | St Helens | | 33,325 | 70.8 | 1 |
| 1966 general election | Sheffield Attercliffe | | 32,336 | 77.3 | 1 |
| 1966 general election | Sunderland South | | 27,567 | 57.5 | 1 |
| 1970 general election | Carlisle | | 21,866 | 53.2 | 1 |
| 1970 general election | Glasgow Central | | 7,936 | 66.0 | 1 |
| 1970 general election | Glasgow Springburn | | 14,968 | 64.3 | 1 |
| 1970 general election | Nottingham South | | 23,031 | 46.3 | 2 |
| 1970 general election | St Helens | | 31,587 | 65.7 | 1 |
| 1970 general election | Sunderland South | | 26,840 | 56.4 | 1 |
| Feb 1974 general election | Carlisle | | 23,119 | 55.2 | 1 |
| Feb 1974 general election | Exeter | | 17,686 | 31.2 | 2 |
| Feb 1974 general election | Glasgow Central | | 9,400 | 58.7 | 1 |
| Feb 1974 general election | Glasgow Springburn | | 18,067 | 53.7 | 1 |
| Feb 1974 general election | St Helens | | 32,621 | 59.0 | 1 |
| Feb 1974 general election | Sunderland South | | 28,296 | 49.6 | 1 |
| Feb 1974 general election | West Bromwich East | | 21,895 | 52.8 | 1 |
| Oct 1974 general election | Carlisle | | 21,079 | 51.2 | 1 |
| Oct 1974 general election | Glasgow Central | | 9,231 | 63.6 | 1 |
| Oct 1974 general election | Glasgow Springburn | | 17,444 | 54.6 | 1 |
| Oct 1974 general election | St Helens | | 32,620 | 64.1 | 1 |
| Oct 1974 general election | Sunderland South | | 28,623 | 55.0 | 1 |
| Oct 1974 general election | West Bromwich East | | 19,942 | 50.5 | 1 |
| 1976 by-election | Newcastle upon Tyne Central | | 4,692 | 47.6 | 1 |
| 1979 general election | Carlisle | | 21,343 | 49.7 | 1 |
| 1979 general election | Derby North | | 28,797 | 44.9 | 1 |
| 1979 general election | Edinburgh Central | | 12,191 | 47.9 | 1 |
| 1979 general election | Glasgow Central | | 8,542 | 72.5 | 1 |
| 1979 general election | Holborn and St Pancras South | | 12,026 | 49.3 | 1 |
| 1979 general election | Huddersfield West | | 16,996 | 40.6 | 2 |
| 1979 general election | Islington North | | 12,317 | 52.6 | 1 |
| 1979 general election | Newcastle upon Tyne Central | | 10,395 | 67.3 | 1 |
| 1979 general election | St Helens | | 32,489 | 59.6 | 1 |
| 1979 general election | Sunderland South | | 29,403 | 53.1 | 1 |
| 1979 general election | Swansea East | | 31,909 | 69.9 | 1 |
| 1979 general election | West Bromwich East | | 19,279 | 47.0 | 1 |
| 1979 general election | West Lothian | | 36,713 | 54.9 | 1 |
| 1983 general election | Carlisle | | 15,618 | 37.5 | 1 |
| 1983 general election | Crewe and Nantwich | | 22,031 | 41.1 | 1 |
| 1983 general election | Derby North | | 18,797 | 36.8 | 2 |
| 1983 general election | Glasgow Garscadden | | 19,635 | 56.2 | 1 |
| 1983 general election | Holborn and St Pancras | | 20,486 | 47.5 | 1 |
| 1983 general election | Linlithgow | | 19,694 | 45.1 | 1 |
| 1983 general election | Livingston | | 14,255 | 37.7 | 1 |
| 1983 general election | Sunderland South | | 22,869 | 45.7 | 1 |
| 1983 general election | Swansea East | | 22,297 | 54.4 | 1 |
| 1983 general election | Tyne Bridge | | 21,127 | 56.5 | 1 |
| 1983 general election | West Bromwich East | | 15,894 | 38.1 | 1 |
| 1983 general election | Wrexham | | 16,120 | 34.3 | 1 |
| 1987 general election | Crewe and Nantwich | | 25,457 | 44.0 | 1 |
| 1987 general election | Derby North | | 20,236 | 37.2 | 2 |
| 1987 general election | Glasgow Garscadden | | 18,920 | 64.4 | 1 |
| 1987 general election | Holborn and St Pancras | | 22,966 | 50.6 | 1 |
| 1987 general election | Linlithgow | | 21,869 | 47.4 | 1 |
| 1987 general election | Livingston | | 19,110 | 45.6 | 1 |
| 1987 general election | Swansea East | | 27,478 | 63.7 | 1 |
| 1987 general election | West Bromwich East | | 18,162 | 42.6 | 1 |
| 1987 general election | Wrexham | | 22,144 | 43.9 | 1 |