There was a church in Kirkby from the early Mediaeval period, and by the early 19th century, it was a cruciform building with a central tower.
The chancel of the new church was rebuilt by Temple Moore in 1905.
[1][2] The church is built of sandstone, the nave and vestry have a roof of Lakeland slate, and the chancel roof is tiled.
The church consists of a nave, a taller chancel with a clerestory, a south aisle, a north chapel, a south vestry, and a west tower with an embattled parapet and corner pinnacles.
Inside, there is a west gallery, late Georgian memorial tablets, fragments of Saxon sculpture built into the vestry, and an aumbry, piscina, sedilia and painted wooden reredos in the chancel.