Eureka Township, Sac County, Iowa

Through the late 19th and early 20th centuries, its population was a mixture of American-born and German-born residents.

The township's name, meaning "I have found it," is said to refer to the good quality of the soil observed by early settlers.

[4] The Sioux City & Wall Lake branch of the Chicago and North Western Transportation Company used to run through Eureka Township.

[9] As of the 2020 census, Eureka Township had a population of 881 in 398 households, and 403 total housing units.

[12] Eureka Township is represented in the Sac County Board of Supervisors by Ranell Drake of District 1.