St. Margaret's was founded in the 14th century by the Abbots of St. Albans. It is a small, but very attractive, country church, with a splendid wall painting of St. Christopher opposite the south door, and several monuments and hatchments to noble families in its walls. The belfry has a ring of six bells, in weekly use, and a feature of the church furniture is that much of it was made by Robert Thompson of Kilburn, North Yorkshire, with mice carved in curious places. It has an open churchyard (including the grave of Earl Alexander of Tunis), with public footpaths running through.
The liturgical tradition is middle of the road Anglican, with use of BCP for Holy Communion (3rd Sunday) and Matins (2nd and 5th Sundays). On other Sundays Commun Worship Communion is used. Sunday services are normally at 9.15 am. The church is open for services and normally on Saturday afternoons in Summer, as well as at other advertised times.
The parish became part of a Joint Benefice with St. Giles South Mymms in 1979 and shares a part-time SSM Vicar.