Market Rasen is a market town and civil parish within the West Lindsey district of Lincolnshire, England. The River Rase runs through it east to west, approximately 13 miles north-east from Lincoln, 18 miles east from Gainsborough, 14 miles west of Louth, and 16 miles south-west from Grimsby. It lies on the main road between Lincoln and Grimsby, the A46, and is famous for its racecourse. In 2001, the town had a population of 3,200.