| Official Name: | Coldwater Township, Butler County |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Butler |
| Area Total Km2: | 93.84 |
| Area Land Km2: | 93.5 |
| Area Water Km2: | 0.34 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.23 |
| Area Land Sq Mi: | 36.1 |
| Area Water Sq Mi: | 0.13 |
| Population As Of: | 2020 |
| Population Total: | 1286 |
| Population Density Km2: | 13.7 |
| Population Density Sq Mi: | 35.5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 311 |
| Elevation Ft: | 1020 |
| Coordinates: | 42.8658°N -92.845°W |
| Blank Name: | FIPS code |
| Blank Info: | 19-90753[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0467631 |
Coldwater Township is one of sixteen townships in Butler County, Iowa, United States. As of the 2020 census, its population was 1,286.[3]
Coldwater Township covers an area of 36.23sqmi and contains one incorporated settlement, Greene. According to the USGS, it contains seven cemeteries: Brethren, Hardemen, Haselroad, Rose Hill, Saint Marys Catholic, South Vilmar and Wilmar.