Reading is a city in Hillsdale County in the U.S. state of Michigan. The population was 1,095 at the 2020 census. Located along M-49, the ci…Reading is a city in Hillsdale County in the U.S. state of Michigan. The population was 1,095 at the 2020 census. Located along M-49, the city is surrounded by Reading Township, but the two are administered autonomously.