Greenfield (Welsh: Maes-glas) is a village in the community of Holywell, Flintshire, north-east Wales, on the edge of the River Dee estuary.

In the mid 19th century up to 80 businesses had set up in the mile stretch between Holywell and Greenfield The remains of some can now be seen as conservation and industrial archeological projects have been undertaken in recent years.

With industrial changes and periodic managerial problems output from the zinc works ceased by the turn of the century and derelict buildings were largely removed by 1928.

Greenfield's oldest building is Basingwerk Abbey, founded circa 1132 by Ranulph de Gernon, 2nd Earl of Chester.

The ruins are now part of Greenfield Valley Heritage Park, with the adjacent grounds home to an agricultural museum.

The station was opened on 1 May 1848 as part of the Chester and Holyhead Railway (now the North Wales Coast Line) and was named simply Holywell.

The Italianate station building designed by Francis Thompson[10] was listed Grade II* in 1970[11] and is a private dwelling.