| Official Name: | Prairie Island Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Nebraska |
| Subdivision Type2: | County |
| Subdivision Name2: | Merrick |
| Area Total Km2: | 38.92 |
| Area Land Km2: | 33.63 |
| Area Water Km2: | 5.29 |
| Area Total Sq Mi: | 15.03 |
| Area Land Sq Mi: | 12.99 |
| Area Water Sq Mi: | 2.04 |
| Area Water Percent: | 13.59 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 82 |
| Population Density Km2: | auto |
| Elevation M: | 505 |
| Elevation Ft: | 1657 |
| Coordinates: | 41.1403°N -97.8825°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0838202 |
Prairie Island Township is one of eleven townships in Merrick County, Nebraska, United States. The population was 82 at the 2020 census.[1] A 2021 estimate placed the township's population at 83.[1]