Ain Mere (from birth to Estification Ervin Martson; February 22, 1903 – April 5, 1969) was an Estonian military officer. During World War II, he was an Obersturmbannführer (Lieutenant Colonel) in the Waffen SS and also the head of the Sicherheitspolizei in Estonia (Security Police) following its creation in 1942. He was born in Vändra and fought voluntarily in the Estonian War of Independence. In early 1919, Mere was wounded while serving on an armored train and was sent to the rear.