Mason is a city and the county seat of Ingham County in the U.S. state of Michigan. The population was 8,252 at the 2010 census. Mason was …Mason is a city and the county seat of Ingham County in the U.S. state of Michigan. The population was 8,252 at the 2010 census. Mason was named after Stevens T. Mason, the state's first governor. In 1836 Charles Noble knew that Michigan would be seeking a central location for a new capital when it became a state. He purchased an area of forest, cleared 20 acres, and founded Mason Center. The "Center" was soon dropped. In 1847, however, the state chose Lansing Township 12 miles northward to be its capital due to its potential for water power. Noble managed to make Mason the county seat instead. Ingham County's first downtown courthouse was built in 1843, and was replaced in 1858, and the economy thrived in the first decades based on sawmills, carriage and cart factories, copper shops, a steam flourmill and a buffalo robe manufacturer. In 1865, Mason was incorporated as a village; in 1875 the town became a city. In the 1800s, Mason was the center of Ingham County activity, even more than was Lansing, the state capital. In 1877, Lansing attempted to take the status of county seat for itself, but the two cities made an agreement that moved some county offices and courts to Lansing in exchange for Mason remaining the county seat. As a result, Michigan is the only state in the country with a capital city that is not also a county seat.hen again in 1905.