There are 15 US Post Offices in Ingham County serving a total of 209,319 residents equating to 13,955 residents per post office. It's estimated that approximately 334,096 packages are handled across the 15 county post offices annually. Ingham County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 280,895. The county seat is Mason. Lansing, the state capital of Michigan, is located within the county, and is the only state capital located in a county that is not also its seat of government. The county is home to Michigan State University, Lansing Community College, and the Class A minor league baseball team Lansing Lugnuts. Ingham County is included in the Lansing-East Lansing, MI Metropolitan Statistical Area. It is considered to be a part of Mid Michigan."