Y is a commune in the Somme department in Hauts-de-France in northern France.
Y bears the shortest place name in France, and one of the shortest in the world. The inhabitants call themselves Ypsilonien(ne)s, from the Greek letter Upsilon), which looks like the letter Y.
The district belonged to the Y family from Vermandois.
The village was caught up in the First World War. It was decorated by Croix de guerre 1914-1918 on 15 December 1920. The Church of Saint-Médard, was rebuilt in 1921, after the destruction caused by the First World War.