Asgarby is a village in the civil parish of Asgarby and Howell, in the North Kesteven district of Lincolnshire, England.
It is situated on the A17 Boston to Newark road, east from Sleaford and north-west from Heckington. In 1921 the parish had a population of 63. On 1 April 1931 the parish was abolished to form "Asgarby and Howell".
Construction to realign the A17 began in July 1967, to replace the dangerous Asgarby bends, being a three-quarter mile, to cost ã100,000, built by A.F. Budge. It was opened by January 1968.
Asgarby Grade I listed Anglican church is dedicated to St Andrew. The church has a crocketed spire and buttresses, a Decorated nave, and an Early English priests' doorway.