Ain Mere (from birth to Estification Ervin Martson; 22 February 1903 – 5 April 1969) was an Estonian military officer in World War II.

Mere's reports on the resettlement of Baltic Germans and the exposure of underground Estonian organisations reached the desk of Lavrenti Beria.

[5] On 5 February 1945, in Berlin, he founded the Eesti Vabadusliit, an anti-communist group, together with fellow Waffen-SS commander Harald Riipalu.

[6] In March 1961, during the war crimes trials in Soviet Estonia, the German Security Police in Estonia, headed by Mere (and later by Julius Ennok), along with Ralf Gerrets and Jaan Viik, was accused in a Soviet court to have been actively involved in the arrest and killing of Estonian Jews.

The British government refused to extradite him, citing a lack of evidence on the part of the Soviet authorities,[8] and he died at the age of 66 in Leicester, England.