Grove Township is one of twelve townships in Humboldt County, Iowa, United States. As of the 2000 census, its population was 316.
Grove Township was organized in 1873.
According to the United States Census Bureau, Grove Township covers an area of ; of this is land, and the remaining is water.
A community named Randolph contained a post office from 1874 to 1875. A post office also existed for the community Arnold, formerly Grove, from 1900 to 1929. Both of these historic communities were located in the northwest corner of Grove Township.
The township contains Hands Grove Township Cemetery.