Signy is the name of two heroines in Norse mythology.

Signy may also refer to:

Signe, a list of people named Signy or Signe Signy Island, an Antarctic island Signy Research Station on the island, operated by the British Antarctic Survey Signy-Avenex, a municipality in Vaud, Switzerland

France Signy-l'Abbaye, a commune in the Ardennes department Signy Abbey, a destroyed Cistercian abbey in Signy-l'Abbaye Signy-le-Petit, a commune in the Ardennes department Signy-Signets, a commune in the Seine-et-Marne department