| Toyma, Tuyma | |
| Source1 Coordinates: | 56.32°N 52.4067°W |
| Mouth Coordinates: | 55.7423°N 52.0315°W |
| Subdivision Type1: | Country |
| Length: | 121km (75miles) |
| Mouth Elevation: | 53m (174feet) |
| Basin Size: | 1450km2 |
The Toyma (ru|Тойма; tt-Cyrl|Туйма) is a river in Udmurtia and Tatarstan, Russian Federation, a right-bank tributary of the Kama. It is 121km (75miles) long, of which 84km (52miles) are in Tatarstan, and its drainage basin covers 1450km2.[1] It begins in Udmurtia and falls to the Kama near Yelabuga, Tatarstan.
Major tributaries are the Vozzhayka, Yurashka, Karinka rivers. The maximal mineralization 400–600 mg/L. The maximal water discharge was 533m3/s in 1979. Drainage is regulated. Average sediment accumulation at the mouth per year is 146mm. Since 1978 it is protected as a natural monument of Tatarstan. Mendeleyevsk and Yelabuga are along the river.