| Official Name: | Ion, Iowa |
| Pushpin Map: | Iowa |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Allamakee |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 679 |
| Coordinates: | 43.1128°N -91.2619°W |
| Area Code: | 563 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 464590 |
Ion is an unincorporated community in Allamakee County, Iowa, United States.
Ion was platted in 1855 [1] and was named after a character in a novel, one of the settlers had recently read.[2] Ion's population was 52 in 1902.[3]