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Allegheny River
| States | New York (52 mi), Pennsylvania (274 mi) |
| Length | 326.7 miles |
| Watershed Length* | 2,801 miles |
| Mouth | Ohio River ⤏ Gulf of Mexico |
| GNIS | 1209386 |
Tributaries
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| Name | Distance from Mouth (miles) | Length (miles) | Watershed Length (miles) |
|---|---|---|---|
| Bear Creek | 83 | 16 | 16 |
| Brokenstraw Creek | 183 | 51 | 81 |
| Buffalo Creek | 29 | 37 | 37 |
| Clarion River | 85 | 103 | 312 |
| Cold Spring Creek | 223 | 17 | 17 |
| Conewango Creek | 191 | 71 | 165 |
| Cowanshannock Creek | 49 | 26 | 26 |
| Crooked Creek | 40 | 60 | 95 |
| Deer Creek | 13 | 18 | 18 |
| Dodge Creek | 263 | 17 | 17 |
| East Hickory Creek | 161 | 16 | 16 |
| East Sandy Creek | 119 | 26 | 26 |
| French Creek | 125 | 120 | 391 |
| Great Valley Creek | 236 | 19 | 19 |
| Kiskiminetas River | 30 | 27 | 444 |
| Mahoning Creek | 56 | 65 | 129 |
| Oil Creek | 133 | 43 | 56 |
| Olean Creek | 257 | 9 | 53 |
| Oswayo Creek | 263 | 33 | 51 |
| Pine Creek | 5 | 23 | 23 |
| Pithole Creek | 142 | 17 | 17 |
| Potato Creek | 279 | 28 | 47 |
| Redbank Creek | 64 | 53 | 154 |
| Sandy Creek | 115 | 36 | 61 |
| Tionesta Creek | 153 | 39 | 112 |
| Tunungwant Creek | 242 | 13 | 36 |
| Wolf Run | 203 | 3 | 55 |
* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey