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 (13 km) south-east of Burnley and 9 miles (14 km) west of Halifax. In 2011, it had a population of 15,481.

A market town is a settlement most common in Europe that obtained by custom or royal charter, in the Middle Ages, a market right, which allowed it to host a regular market; this distinguished it from a village or city. In Britain, small rural towns with a hinterland of villages are still commonly called market towns, as sometimes reflected in their names.