Mumcu (from the Turkish noun mum ("candle") followed by the actuator suffix -cu, therefore literally "chandler") is a Turkish surname. Notable people with the surname include:
Ali Mumcu, Turkish footballer Erkan Mumcu, Turkish politician Güldal Mumcu (born 1951), Turkish politician Özgür Mumcu (born 1977), Turkish writer and journalist Uğur Mumcu (1942–1993), Turkish investigative journalist