Todmorden is a market town and civil parish in the Upper Calder Valley in Calderdale, West Yorkshire, England. It is 17 miles north-east of Manchester, 8 miles south-east of Burnley and 9 miles west of Halifax. In 2011, it had a population of 15,481. Todmorden is at the confluence of three steep-sided Pennine valleys and is surrounded by moorlands with outcrops of sandblasted gritstone.