| Official Name: | Rainsville, Indiana |
| Settlement Type: | Unincorporated community and Census-designated place |
| Pushpin Map: | USA Indiana Warren County#Indiana#USA |
| Pushpin Label: | Rainsville |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Warren |
| Subdivision Type3: | Township |
| Subdivision Name3: | Pine |
| Established Title: | Founded |
| Established Date: | 1833 |
| Founder: | Isaac Rains |
| Area Total Sq Mi: | 0.21 |
| Population As Of: | 2020 |
| Population Total: | 28 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.4142°N -87.3158°W |
| Elevation Ft: | 679 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47918 |
| Area Code: | 765 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2806548 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.53 |
| Area Land Km2: | 0.53 |
| Area Land Sq Mi: | 0.21 |
| Population Density Sq Mi: | 135.92 |
| Population Density Km2: | 52.45 |
Rainsville is a small unincorporated community in Pine Township, Warren County, in the U.S. state of Indiana.
Rainsville was platted on April 16, 1833, by Isaac Rains, who had built a mill here the previous year; the town was named for him.[2] A post office was established on February 5, 1836, and closed on September 15, 1904.[3]
Rainsville is located southwest of Pine Village and east of U.S. Route 41. Big Pine Creek flows from Pine Village, around the north side of the town, and continues to the southwest.