Maclay
- Alasdair Maclay
- Alfred B. Maclay Gardens State Park
- Ally Maclay
- Baron Maclay
- Charles Maclay
- Charles Maclay (anatomist)
- Claremont School of Theology
- Edgar Stanton Maclay
- John Maclay, 1st Viscount Muirshiel
- Joseph Maclay, 1st Baron Maclay
- Joseph Maclay, 2nd Baron Maclay
- Kaleo Kanahele Maclay
- Maclay Hoyne
- Maclay Mansion
- Maclay School
- Maclays Brewery
- Margaret Maclay Bogardus
- McClay
- McLay (disambiguation)
- Nicholas Miklouho-Maclay
- Robert Maclay (merchant)
- Robert Maclay Widney
- Robert Plunket Maclay
- Robert Samuel Maclay
- Samuel Maclay
- Sky Macklay
- Tara Maclay
- Thaddeus Maclay Mahon
- William B. Maclay
- William Maclay (Pennsylvania politician, born 1737)
- William Maclay (Pennsylvania politician, born 1765)
- William Maclay Awl
- William P. Maclay (Medal of Honor)
- William Plunkett Maclay