Holbeach is a market town and civil parish in the South Holland District in Lincolnshire, England. The town lies 8 miles from Spalding; 17 miles from Boston; 20 miles from King's Lynn; 23 miles from Peterborough; and 43 miles by road from Lincoln. It is on the junction of the A151 and A17. The Prime Meridian of the world passes through the west of Holbeach and is marked with a millstone at Wignals Gate.