| Official Name: | Summit Township, Adair County |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Adair |
| Area Total Km2: | 92.18 |
| Area Land Km2: | 92.04 |
| Area Water Km2: | 0.14 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 35.59 |
| Area Land Sq Mi: | 35.54 |
| Area Water Sq Mi: | 0.05 |
| Population As Of: | 2010 |
| Population Total: | 967 |
| Population Density Km2: | 10.5 |
| Population Density Sq Mi: | 27.2 |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 419 |
| Elevation Ft: | 1375 |
| Coordinates: | 41.4625°N -94.6414°W |
| Blank Name: | FIPS code |
| Blank Info: | 19-94035[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0468760 |
Summit Township is one of seventeen townships in Adair County, Iowa, USA. At the 2010 census, its population was 967.[3]
Summit Township was organized in 1871. Summit is named from the ridge it contains that forms the watershed between the Mississippi and Missouri rivers.[4]
A post office named Linwood opened in March 1895. Henry L. Manion was the postmaster.[5] This post office was in Summit Township and was discontinued[6] in 1903.[7]
Summit Township covers an area of 35.59sqmi and contains one incorporated settlement, Adair. According to the USGS, it contains two cemeteries: Saint Johns and Sunny Hill.