The Fylde is a coastal plain in western Lancashire, England. It is roughly a 20 kilometre square shaped peninsula, bounded by Morecambe Bay to the north, the Ribble estuary to the south, the Irish Sea to the west, and the Bowland hills to the east. The eastern boundary is approximately the location of the M6 motorway.
It is a flat, alluvial plain; parts were once dug for peat, and it is the western part of an area formerly known as Amounderness. The name Fylde is of Scandinavian origin, meaning field.
The west coast is almost entirely urban, containing the towns of Fleetwood, Cleveleys, Blackpool and Lytham St Annes, with Thornton and Poulton-le-Fylde not far inland. This area forms the Blackpool Urban Area. The central southern part of the Fylde includes the smaller towns of Kirkham and Wesham. The rest of the Fylde is rural, containing villages such as Freckleton, Warton, Wrea Green, Great Eccleston, Hambleton, Knott End and Pilling.