| Official Name: | Erin Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Hancock |
| Area Total Km2: | 94.19 |
| Area Land Km2: | 94.19 |
| Area Water Km2: | 0 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.37 |
| Area Land Sq Mi: | 36.37 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2000 |
| Population Total: | 218 |
| Population Density Km2: | 2.3 |
| Population Density Sq Mi: | 6 |
| Elevation M: | 362 |
| Elevation Ft: | 1188 |
| Coordinates: | 43.0406°N -93.7939°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 50423, 50447 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0467797 |
Erin Township is one of sixteen townships in Hancock County, Iowa, USA. As of the 2000 census its population was 218.[1]
Erin Township was organized in 1879.[2] It was originally settled chiefly by Irish immigrants, who named it Erin, the poetic form of Ireland.[3]
According to the United States Census Bureau, Erin Township covers an area of 36.37 square miles (94.19 square kilometers).
The township contains Saint Patrick's Cemetery.