| Official Name: | Rio, Louisiana |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Louisiana#USA |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Washington |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.94 |
| Area Land Km2: | 2.94 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 1.13 |
| Area Land Sq Mi: | 1.13 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 137 |
| Population Density Km2: | 46.68 |
| Population Density Sq Mi: | 120.92 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 98 |
| Coordinates: | 30.6931°N -89.89°W |
| Area Code: | 985 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 543624 |
Rio is an unincorporated community and census-designated place (CDP) in Washington Parish, Louisiana, United States. It was first listed as a CDP in the 2020 census with a population of 137.[2]
Rio is located at the junction of Louisiana highways 1074 and 1075, 7.2miles south-southwest of Bogalusa.[3]
| White alone (NH) | 119 | 86.86% | |
| Black or African American alone (NH) | 1 | 0.73% | |
| Native American or Alaska Native alone (NH) | 1 | 0.73% | |
| Asian alone (NH) | 0 | 0.00% | |
| Pacific Islander alone (NH) | 0 | 0.00% | |
| Some Other Race alone (NH) | 1 | 0.73% | |
| Mixed Race/Multi-Racial (NH) | 13 | 9.49% | |
| Hispanic or Latino (any race) | 2 | 1.46% | |
| Total | 137 | 100.00% |
It is in Bogalusa City Schools,[5] which operates Bogalusa High School.