Market Rasen is a town and civil parish within the West Lindsey district of Lincolnshire, England. The River Rase runs through it east to west, approximately 13 miles (21 km) north-east from Lincoln, 18 miles (29 km) east from Gainsborough and 16 miles (26 km) south-west from Grimsby. It lies on the main road between Lincoln and Grimsby, the A46 and is on National Cycle Route 1 (part of EuroVelo 12) of the National Cycle Network.
In 2001 the town had a population of 3,200. In the 2011 census he population of the civil parish was 3,904.
The town is known for Market Rasen Racecourse and being close to the epicentre of a 2008 earthquake.