Jasper is an unincorporated community within Lenawee County in the U.S. state of Michigan. The U.S. Census Bureau defines the area as census-designated place (CDP) for statistical purposes. The CDP had a population of 412 at the 2010 census. Located along M-52, Jasper is within Fairfield Township and has its own post office with the 49248 ZIP Code.
According to the U.S. Census Bureau, the community has an area of 4.032 square miles (10.44 km2), all of it land.
The first European settler in Jasper was Andrew Millet, arriving in 1824. A post office was opened June 18, 1874, with Henry Ferguson as the first postmaster. The Lake Shore and Michigan Southern Railway had a depot in Jasper. The station was at first known as Fairfield.The community of Jasper was listed as a newly-organized census-designated place for the 2010 census, meaning it now has officially defined boundaries and population statistics for the first time.