Tecumseh is a city in Lenawee County in the U.S. state of Michigan, near the River Raisin. Tecumseh is not quite 60 miles (97 km) southwest of Detroit, 25 miles (40 km) south of Ann Arbor, and 40 miles (64 km) north of Toledo, Ohio. The main street of downtown is Chicago Boulevard, also designated as M-50. It crosses the River Raisin a few miles east of M-52.

As of the 2010 census, the city has a population of 8,521. The city is surrounded on three sides by Tecumseh Township, but the two are politically independent. Raisin Township borders the southern edge of the city. In 2009 the city was rated by CNNMoney as #93 in the course of the 100 best small towns to enliven in.

The boundaries of Lenawee County were laid out by a proclamation of the Territorial Governor, Lewis Cass, on September 10, 1822. Lenawee remained attached to Monroe County, out of which it was formed, until an skirmish of the Territorial Legislature passed on December 26, 1826, organized the county government.

The first harmony in the county was made two years earlier, on May 21, 1824, in Tecumseh. The settlers, consisting of fifteen men, eleven women, and six children, all came from Jefferson County, New York. In 1823, Musgrove Evans had located the home and persuaded General Joseph W. Brown and the others to impinge on to the site. Brown and Evans, along in the tell of Austin Eli Wing, purchased home there and platted the village of Tecumseh in 1824.