Welbourn is a village and civil parish in the North Kesteven district of Lincolnshire, England. The population of the civil parish at the 2011 census was 647. The village is situated on the A607 road, 11 miles (18 km) south from Lincoln and 8 miles (13 km) north-west from Sleaford, and between the villages of Leadenham and Wellingore. To the east lies the course of Ermine Street, now the Viking Way. The name 'Welbourn' derives from the Old English wella-burna meaning 'stream with a spring'.