| Official Name: | Coolspring Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | LaPorte |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 36.1 |
| Area Land Sq Mi: | 35.97 |
| Area Water Sq Mi: | 0.14 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 15684 |
| Population Density Sq Mi: | 409.2 |
| Elevation Footnotes: | [2] |
| Elevation M: | 199 |
| Elevation Ft: | 653 |
| Coordinates: | 41.6547°N -86.8731°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-15040[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453247 |
Coolspring Township is one of twenty-one townships in LaPorte County, Indiana. As of the 2020 census, its population was 15,684 (up from 14,718 at 2010[4]) and it contained 7,302 housing units.
Coolspring Township was established in 1836.[5]
According to the 2010 census, the township has a total area of, of which (or 99.64%) is land and (or 0.39%) is water.[4]
The headwaters of the Little Calumet River is located within Coolspring Township, at Red Mill County Park.
The unincorporated town of Waterford is located within the township.