| Official Name: | Green Island, Iowa |
| Settlement Type: | Village |
| Pushpin Map: | Iowa#USA |
| Pushpin Label: | Green Island |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Jackson |
| Unit Pref: | Imperial |
| Area Water Km2: | 0 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Elevation Footnotes: | [1] |
| Elevation M: | 187 |
| Elevation Ft: | 614 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Coordinates: | 42.1536°N -90.3221°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 52064 |
| Area Code: | 563 |
Green Island is an unincorporated settlement in Jackson County, Iowa, United States.
Founded in the 1800s, Green Island's population was 125 in 1902,[2] and 132 in 1925.[3]
Green Island was an incorporated community until 1993.