| Grand Bayou | |
| Official Name: | Hamlet of Grand Bayou |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Louisiana#USA |
| Pushpin Map Caption: | Location within the state of Louisiana |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Red River |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Coordinates: | 32.0869°N -93.4733°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 543251[1] |
Grand Bayou is an unincorporated community in west central Red River Parish, Louisiana, United States. It is located near the intersection of Louisiana Highway 1 and U.S. Highway 84. The community can also be reached by using exit 172 of Interstate 49 in De Soto Parish and traveling north into Red River Parish.
Lloyd F. Wheat, a former state senator from Red River and Natchitoches parishes, formerly resided in Grand Bayou.
Public schools in Red River Parish are operated by the Red River Parish School District.
It is in the service area of Bossier Parish Community College.[2]