Cabourne is a hamlet and civil parish in the West Lindsey district of Lincolnshire, England. It is situated on the A46 road, and just over 1 mile (1.6 km) east from the town of Caistor. It is in the civil parish of Swallow. The parish church is a Grade II* listed building dedicated to Saint Nicholas. The tower dates from the 11th century, the rest of the church being 15th-century, with a restoration in 1872. During restoration a Norman font was unearthed below the floor. A late 11th- or 12th-century grave marker lies against the east wall of the chancel.