| Official Name: | Chain-O-Lakes, Indiana |
| Settlement Type: | Unincorporated community and Census designated place |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Chain-O-Lakes |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | St. Joseph |
| Subdivision Type3: | Township |
| Subdivision Name3: | Warren |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 41.7089°N -86.3772°W |
| Elevation Ft: | 761 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46628 |
| Area Code: | 574 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2830521 |
Chain-O-Lakes is an unincorporated community in Warren Township, St. Joseph County, in the U.S. state of Indiana.
The community was so named on account of there being a chain of lakes near the town site.[1]