'''Coiny''' is a French surname. Notable people with the surname include:
== People == * Jacques Joseph Coiny (1761–1809), French engraver * Joseph Coiny (1795–1829), French engraver, son of Jacques Joseph Coiny
== Fictional characters == * Coiny, a character from the first season of ''Battle for Dream Island'', an animated web series
{{Surname}} Category:Surnames of French origin