Lake Cargelligo (, locally [ˌlæɪk kaːˈdʒeləɡəʉ]) is a town in the Central West region of New South Wales, Australia, on Lake Cargelligo. It is in Lachlan Shire. At the 2011 census, Lake Cargelligo had a population of 1,380 people. Its name is said to be a corruption of the Aboriginal word 'Kartjellakoo' meaning 'he had a coolamon'. A coolamon is a shallow wooden dish. Alternatively it is derived from Wiradhuri and Ngiyambaa "gajal" for water container with suffix "lugu" for "her" or "his". In 2011 it had an indigenous population of 236 (17.1%) and an Australian born population of 1,241 (89.7%).