| Official Name: | Ash Grove Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Iroquois County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Iroquois County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Iroquois |
| Established Title: | Established |
| Established Date: | November 6, 1855 |
| Area Total Sq Mi: | 61.09 |
| Area Land Sq Mi: | 61.03 |
| Area Water Sq Mi: | 0.06 |
| Area Water Percent: | 0.10 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 12 |
| Elevation M: | 204 |
| Elevation Ft: | 669 |
| Coordinates: | 40.6183°N -87.8436°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 60924, 60926, 60953, 60955 |
| Blank Name: | FIPS code |
| Blank Info: | 17-075-02453 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 700 |
| Unit Pref: | Imperial |
Ash Grove Township is one of twenty-six townships in Iroquois County, Illinois, USA. As of the 2010 census, its population was 731 and it contained 316 housing units.[2]
The first settler in the area that became Ash Grove Township was Robert Roberts, who arrived in 1833.[3] The township was formed when township government was adopted by the county in 1855.[4] Its current borders were established on September 15, 1868, when Fountain Creek Township was formed from a portion of Ash Grove Township.[5]
According to the 2010 census, the township has a total area of, of which (or 99.90%) is land and (or 0.10%) is water.[2]
(This list is based on USGS data and may include former settlements.)
The township contains these six cemeteries: Ash Grove, Cissna Park, Immanuel Lutheran, Saint John's Ash Grove, Saint Paul Lutheran and Schwer.