Onat is a surname and a masculine given name of Turkish origin. Notable people with the name include:
Surname Çiğdem Selışık Onat (born 1939), Turkish actress Emin Halid Onat (1908–1961), Turkish academic and architect İlhan Onat (1929–2013), Turkish chess player and pharmacist
Given name Onat Kazaklı (born 1993), Turkish rower Onat Kutlar (1936–1995), Turkish writer