August Rei, Estonian lawyer and politician, Head of State of Estonia (d. 1963)

August Rei VR III/1 (22 March [O.S. 10 March] 1886 – 29 March 1963) was an Estonian politician, the Head of State (Riigivanem) of Estonia in 1928–1929, and the Prime Minister in duties of the President of Estonia in the government in exile in 1945–1963.