Sibsey is a village in the East Lindsey district of Lincolnshire, 5 miles N of Boston and 26 miles SE of Lincoln. The village is in the Licolnshire fens and is the centre of a thriving farming area. The main street of the village is the A16 which runs N from Boston to Louth and Grimsby. The church is in the village centre on the E side of the main street.

It consists of a W tower, an aisled nave with a S porch, and chancel with a N vestry. Of these the 4-storey tower is 13thc in its 3 lowest stages with an embattled 15thc top storey. The nave aisles were added in the 12thc, and a clerestorey in the 15thc. In 1840 the nave piers and responds were heightened, dramatically altering the interior elevation. The chancel was rebuilt in 1855, by Kirk but contains late-medieval features. Construction is of ashlar with some red brick patching. Romanesque sculpture is found in the N nave doorway and in the S and N nave arcades.

The ambitious use of slipped scallop capitals in the N doorway, as well as the dovetail moulded arch indicate a date c.1170 for this work. The relationship between the shafts and arch of the N doorway with the surrounding masonry suggests that it has been rebuilt. The stones of the jambs are clearly modern replacements and the wall above the arch does not appear to be bonded with it. The coursing of the E responds in both arcades is similar to that of the upper extensions on the nave piers and is clearly a result of renovations. The original floor level of the church is probably that at which the two W respond bases lie. The inclusion of crocket capitals along with the scallops and flat leat suggest an 1170 date, although the scalloped work is not so ambitious as the doorway.