Armstrong Lake is a lake in

Blue Earth County, Minnesota Blue Earth County is a county in the State of Minnesota. As of the 2020 census, the population was 69,112. Its county seat is Mankato. The county is named for the Blue Earth River and for the deposits of blue-green clay once evident along the ...

, in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. Armstrong Lake was named for John Armstrong, an early settler.

References

{{authority control Lakes of Minnesota Lakes of Blue Earth County, Minnesota