| Official Name: | Extension, Louisiana |
| Pushpin Map: | Louisiana#USA |
| Pushpin Label: | Extension |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Louisiana |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Franklin |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 62 |
| Coordinates: | 31.9708°N -91.8058°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 71243 |
| Area Code: | 318 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 543195 |
Extension is an unincorporated community in Franklin Parish, Louisiana, United States. Its ZIP code is 71243.[1]
Singer and songwriter Richard Berry was born in Extension. He is known for writing one of the world's most recorded songs, "Louie Louie."[2]