The church is almost entirely of the 15thc. both inside and outside. It consists of a W tower, three-bay nave with N and S aisles, and a long chancel with a vestry to the S and a chapel with a three-bay arcade to the N. The chancel was restored in 1851. The font may be Romanesque.

Although there are entries for Belton on the Isle of Axholme in Domesday Book, there is no record of a church here in 1086. The first record of the church dates from 1145 when Roger de Mowbray granted the living of the church of Belton to Newburgh Priory, an Augustinian house he had founded between 1142 and 1143.

Pevsner dates this font to the Romanesque period, probably based on its lack of ornamentation. However the thorough painting of the font makes it impossible to analyse the surface of the stone, and there is an element of “perfection” in the clean profile of bowl that, at least to this author, raises a question about a Romanesque date, or at least suggests a re-carving of the bowl.