Todmorden, town (parish), Calderdale metropolitan borough, metropolitan county of West Yorkshire, historic county of Yorkshire, northern England. It lies on the River Calder and the Rochdale Canal.
Todmorden is surrounded by high moorland, and it is a junction for east-west rail routes across the Pennines. Industries formerly included cotton spinning (related to the cotton industry of neighbouring Lancashire). Contemporary industries include light engineering. Pop. (2001) 14,941; (2011) 15,481.