| Atchafalaya | |
| Settlement Type: | Ghost Town |
| Pushpin Map: | USA Louisiana |
| Pushpin Map Caption: | Location within the state of Louisiana |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Louisiana |
| Subdivision Type2: | Parish |
| Subdivision Name2: | St. Martin |
| 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: | 30.3463°N -91.7193°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
Atchafalaya is a ghost town that was located in St. Martin Parish, approximately 6 miles north of Butte La Rose, Louisiana, United States and just north of I-10 on the Atchafalaya River. The site of the town itself is located at coordinates 30°20'40.9"N 91°43'26.8"W, and is abandoned. United States Geological Survey maps from 1935 [1] show the town to be located on the east bank of the Atchafalaya River at the Southern Pacific Railroad crossing, which was built in 1908. After the bridge was damaged due to the Great Mississippi Flood of 1927, the railroad from Lafayette to Baton Rouge was abandoned a few years later. With no transportation in and out, the town population began to dwindle, with the last resident leaving in 1959.[2] There is no visible trace of the town left today.