St Etheldreda's is the Anglican parish church of Old Hatfield, Hertfordshire in the United Kingdom.

It once served Hatfield House, as well as the village, as a place of worship and is exceptionally grand for a parish church.

The dedication to St Etheldreda derives from the Bishops of Ely for whom she is a patron saint.

The church stands at the top of a hill with Old Hatfield village centre to the west.

Historically, St Etheldreda's Church had a steeple on top of the west tower and this is shown in many early illustrations.