Ifield Water Mill is a 19th-century weatherboarded watermill in the Ifield neighbourhood of Crawley, a town and borough in West Sussex, England. Built on the site of an earlier, smaller flour mill, which itself replaced an iron forge—one of many in the Crawley area—it fell into disuse in the 1930s. The local council, which acquired the land for housing development in the 1970s, leased the mill to local enthusiasts, who restored it to working order. The mill and an associated house are listed buildings, and there is also a cottage on the site.

Ifield is a former village and now one of 14 neighbourhoods within the town of Crawley in West Sussex, England. Ifield is in the west of the town and is bordered by Ifield West, Horsham, Langley Green to the north east, West Green to the east across the ring road and Gossops Green and Bewbush to the south across the Arun Valley railway line.