| Biya | |
| Source1: | Lake Teletskoye |
| Source1 Coordinates: | 51.786°N 87.246°W |
| Mouth: | Ob |
| Mouth Coordinates: | 52.4317°N 85.0239°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 301km (187miles) |
| Discharge1 Avg: | 477m3/s |
| Discharge1 Location: | Biysk |
| Basin Size: | 37000km2 |
| Tributaries Right: | Lebed |
| Pushpin Map: | Russia Altai Krai |
| Pushpin Map Caption: | Mouth location in Altai Krai, Russia |
The Biya (Russian: Би́я; Southern Altai: Бий, Biy) is a river in the Altai Republic and Altai Krai in Russia. At its confluence with the Katun, downstream of the city Biysk, the Ob is formed.[1] The Biya is 301 km long; the area of its drainage basin is 37,000 km2. It flows out of the Lake Teletskoye. The river freezes up in mid-November to early December (some parts of the river freeze over on a year-to-year basis). It breaks up in early or mid-April. The Biya is navigable on its entire length.[2]
The maximum depth of river is 28feet.