Holy Trinity Church, Greenfield, is in Basingwerk Avenue, Greenfield, Flintshire, Wales . It is an active Anglican church in the former parish of Holywell, the Estuary and Mountain Mission Area, the archdeaconry of St Asaph and the diocese of St Asaph.[1] The church was designated as a Grade II listed building on 19 August 1991.
The church was built in 1870–71 to a design by Ewan Christian. It consisted of a nave and a south aisle, and had lancet windows. Christian planned an apsidal chapel and a vestry at the southeast, but these were never built. The church was licensed for worship on 18 October 1871. In 1910–11 the Chester architect John Douglas added a chancel in a simpler design. The church was consecrated on 25 April 1911. The current Vicar of Holywell is the Rev'd Dominic Austin Cawdell OGS.[2]