Ivor the Engine is a British children's animation by Oliver Postgate and Peter Firmin's Smallfilms company.

The series documents the adventures of a small green locomotive named Ivor who lived in the "top left-hand corner of Wales" and worked for The Merioneth and Llantisilly Railway Traction Company Limited.

Possessing the uncanny ability to talk through his whistle, Ivor counted many of the series' primary characters amongst his friends.