Cookstown (An Chorr Chríochach in Irish) is a town in County Tyrone in Northern Ireland. It is the fourth largest town in the county (next to Omagh, Strabane and Dungannon respectively) and has a population of 10,646 people (in the 2001 Census). It was founded in 1609 by planter Alan Cooke. It was one of the main centres of the linen industry. A working linen mill can still be seen at Wellbrook Beetling Mill outside Cookstown: beetling is the process used to smooth and polish linen after weaving.

Cookstown's main street, known as the One Mile Street, is the longest, widest and deepest in Ireland.