Black Hawk Township is located in

Jefferson County, Iowa Jefferson County is a county located in the U.S. state of Iowa. As of the 2020 United States Census, the population was 15,663. The county seat is Fairfield. The county was formed in January 1839, and was named for U.S. President Thomas Jeffers ...

. The population as of the 2020 Census is 327. The land area is with no water area.

References

Townships in Jefferson County, Iowa Townships in Iowa {{JeffersonCountyIA-geo-stub