Tecumseh is located in Johnson County
(of which it is the county seat), situated at the junction of US Hwy 136 & Hwy 50, between Beatrice
. This community is also positioned along the banks of the Big Nemaha River.
The population estimate for July 1, 1998 was 1,691, a decrease of 11 since 1990.
Tecumseh was officially incorporated in 1856.