John Spencer can refer to different people:

• John Spencer is an American actor in series such as L.A. Law and The West Wing.
• John Spencer is a former Scottish football (soccer) player.
• John Spencer is an English snooker player.
• John Spencer is a Dutch singer.
• John Poyntz Spencer, 5th Earl Spencer (1835-1910) was a British politican.
• John Spencer, 3rd Earl Spencer (1782-1845) was a British politician.

see also: Jon Spencer