| Official Name: | Linn Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Dallas |
| Area Total Km2: | 93.71 |
| Area Land Km2: | 93.71 |
| Area Water Km2: | 0 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.18 |
| Area Land Sq Mi: | 36.18 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2000 |
| Population Total: | 584 |
| Population Density Km2: | 6.2 |
| Population Density Sq Mi: | 16.1 |
| Elevation M: | 311 |
| Elevation Ft: | 1020 |
| Coordinates: | 41.6489°N -94.23°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0468281 |
Linn Township is a township in Dallas County, Iowa, USA. As of the 2000 census, its population was 584.
Linn Township covers an area of 36.18sqmi and contains one incorporated settlement, Linden. According to the USGS, it contains three cemeteries: East Linn, Harper and West Linn.
The Middle Raccoon River and the streams of Cass Creek and Mosquito Creek run through this township.