Spring Arbor is an unincorporated community within Spring Arbor Township, Jackson County in the U.S. state of Michigan. The U.S. Census Bureau has defined a census-designated place (CDP) with the same name for statistical purposes. The CDP has no official status as a municipality and the boundaries defined by the Census Bureau may not precisely correspond to local understanding of the Spring Arbor area. The population of the CDP was 2,188 at the 2000 census. There is a post office in Spring Arbor with ZIP code 49283 that serves an area larger than the CDP, but smaller than the township. As of 2000, the ZIP Code Tabulation Area had a population of 3,110. Spring Arbor Township surrounds the community, but also includes portions of surrounding communities. As of 2000, the township had a population of 7,577. Spring Arbor is the home of Spring Arbor University, a liberal arts university affiliated with the Free Methodist Church.