Onar may refer to:
Ónar, in Norse mythology Onar, Ardabil, a town in Iran ONAR, a Greek musical group Onar (rapper), a Polish rapper
People with the name Orhan Onar (1923–2009), Turkish judge Sıddık Sami Onar (1898–1972), Turkish academic Onar Onarheim (1910–1988), Norwegian politician