Update 10-15-2022 - It seems the post office is now closed.
From Michigan Place Names
A station on the Detroit & Mackinaw Railroad. The village was founded by and named after Joseph Turner of Saginaw. John H Larkin became the first postmaster on Dec 21, 1885. The office was closed March 5, 1888, but has been restored since Dec 15, 1891. Incorporated as a village in 1915.
From Wikipedia
Turner is a village in Arenac County of the U.S. state of Michigan. The population was 114 at the 2010 census, which ranks Turner as the least-populated village in the state. The village is located within Turner Township. According to the United States Census Bureau, the village has a total area of 1.02 square miles (2.64 km2), all land.