Thomas is one of the main characters in the Thomas & Friends franchise. Thomas may also refer to:
- Thomas - a small blue tank engine.
- Thomas the Baby - a baby named after Thomas.
- Thomas the Piglet - a piglet named after Thomas.
- Thomas the Tank Engine - the second book in the Railway Series.
- Thomas the Tank Engine (compilation book) - a compilation book featuring six books from the Railway Series.
- Thomas (Story Library book) - a My Thomas Story Library book about Thomas.
- Thomas the Tank Engine (handheld game) - a handheld game released in 1984.
- Thomas the Tank Engine (video game) - a video game that was released for several consoles.
- Thomas the Tank Engine (Sega Genesis/Mega Drive) - a video game released for the Sega Genesis/Mega Drive.
- Thomas & Friends - a television series.