- Source: Seignelay (disambiguation)
Seignelay is a commune in the Yonne department in Bourgogne-Franche-Comté in north-central France.
Seignelay may also refer to:
Jean-Baptiste Colbert, Marquis de Seignelay (1651–1690), French politician
Seignelay River, river of the Côte-Nord region of Quebec, Canada
Seignelay River, former name of the Kankakee River in Illinois, United States
Seignelay, a French Navy armoured cruiser, named after the Marquis de Seignelay