Tottenham Lock (No17) is a paired lock on the River Lee Navigation in the London Borough of Haringey, England and is located near Tottenham, London. Like other locks as far as Ponders End it is large enough to take barges of up to 130 tons. The primary lock has been upgraded to mechanical operation, but the secondary west lock is operated manually.

Tottenham Lock was originally nearer to Stonebridge, but was relocated to its current location when the cut was created, creating a junction just south of the lock.