| Bailley Brook | |
| Name Other: | Tributary to Tunungwant Creek |
| Pushpin Map: | New York#USA |
| Pushpin Map Caption: | Location of Bailley Brook mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Subdivision Type3: | County |
| Subdivision Name3: | Cattaraugus |
| Length: | 1.78miles[1] |
| Discharge1 Location: | Tunungwant Creek |
| Discharge1 Avg: | 2.26cuft/s at mouth with Tunungwant Creek[2] |
| Source1: | divide of Chipmunk Creek |
| Source1 Location: | about 3 miles northeast of Limestone, New York |
| Source1 Coordinates: | 42.0617°N -78.6084°W[3] |
| Source1 Elevation: | 2115feet |
| Mouth: | Tunungwant Creek |
| Mouth Location: | about 1.5 miles north of Limestone, New York |
| Mouth Coordinates: | 42.0515°N -78.6384°W |
| Mouth Elevation: | 1381feet |
| Progression: | Tunungwant Creek → Allegheny River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Allegheny River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | N Main Street, US 219 |
Bailley Brook is a 1.78miles long first-order tributary to Tunungwant Creek.[1] It is the only stream of this name in the United States.[3]
Bailley Brook rises about northeast of Limestone, New York in Cattaraugus County and then flows generally west to meet Tunungwant Creek about north of Limestone, New York.
Bailley Brook drains of area, receives about of precipitation, and is about 93.64% forested.