Thirsk is a small market town and civil parish in the Hambleton district of North Yorkshire, England. Historically part of the North Riding of Yorkshire, it is south-south east of the county town of Northallerton.
According to the 2011 UK Census, the population was 4,998. Thirsk is a popular tourist destination close to the Yorkshire Dales and the North York Moors. It has a variety of small and medium-sized businesses. It was the home of author James Herriot and birthplace of Thomas Lord, after whom Lord's Cricket Ground is named. Thirsk racecourse is on the western edge of the town.