| Official Name: | Red Line, Iowa |
| Pushpin Map: | Iowa |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Shelby |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1266 |
| Coordinates: | 41.7172°N -95.1511°W |
| Area Code: | 712 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 460552 |
Red Line is an unincorporated community in Polk Township, Shelby County, Iowa, United States.[1] Red Line is located along County Highway M56 east-northeast of Harlan.[2]