| Allen Branch | |
| Name Other: | Tributary to Fourche a Renault |
| Map Size: | 300 |
| Pushpin Map: | USA Missouri#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Allen Branch mouth |
| Pushpin Map Alt: | Map of Allen Branch mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Missouri |
| Subdivision Type3: | County |
| Subdivision Name3: | Washington |
| Length: | 3.15miles[1] |
| Discharge1 Location: | Fourche a Renault |
| Discharge1 Avg: | 11.41cuft/s at mouth with Fourche a Renault[2] |
| Source1: | Lost Creek divide |
| Source1 Location: | about 5 miles south-southeast of Shirley, Missouri |
| Source1 Coordinates: | 37.865°N -90.9025°W[3] |
| Source1 Elevation: | 1170feet[4] |
| Mouth: | Fourche a Renault |
| Mouth Location: | about 0.5 miles south of Shirley, Missouri |
| Mouth Coordinates: | 37.9286°N -90.9169°W |
| Mouth Elevation: | 850feet[5] |
| Progression: | Fourche a Renault → Mineral Fork → Big River → Meramec River → Mississippi River → Gulf of Mexico |
| River System: | Big River |
| Tributaries Left: | Race Creek |
| Tributaries Right: | unnamed tributaries |
| Bridges: | Briar Patch Lane, MO 8, Sunnen Lake Road (x2) |
Allen Branch is a stream in Washington County, Missouri. It is a tributary of Fourche a Renault.
Allen Branch has the name of John Allen, the original owner of the site.[6]
Allen Branch rises approximately five miles south-southeast of the community of Shirley. The stream flows generally north passing under Missouri Route 8 past Shirley to join the Fourche a Renault about one half mile north of Shirley.[7]
Allen Branch drains of area, receives about 42.7 in/year of precipitation, has a wetness index of 334.51, and is about 88% forested.[2]