Forest-l'Abbaye (French pronunciation: [fɔʁɛ labei]; Picard: Fèr-l'Abbie) is a commune in the Somme department in Hauts-de-France in northern France.

The commune is situated on the D105 road, on the edge of the forest of Crécy, 13 kilometres (8 mi) north of Abbeville.

There was a station on the Réseau des Bains de Mer located on the line from Abbeville to Dompierre-sur-Authie, opened on 19 June 1892.

Forest-l'Abbaye was the junction for the branch of the Réseau des Bains de Mer to Noyelles-sur-Mer, which opened on 24 August 1892.

This Arrondissement of Abbeville geographical article is a stub.