A / B / C / D / E / F / G / H / I / J / K / L / M / N / O / P / Q / R / S / T / U / V / W / X / Y / Z
| Lake Name (short) | Lake Name (in full) | Country |
|---|---|---|
| Ubinskoe | Lake Ubinskoe | Russia |
| Ubolratana | Ubolratana Reservoir | Thailand |
| Udawalawa | Udawalawa Reservoir | Sri Lanka |
| Uglich Reservoir | Uglich Reservoir | Russia |
| Ullswater | Ullswater | UK |
| Ulu Lepar | Lake Ulu Lepar System | Malaysia |
| Ulungur | Lake Ulungur | China |
| Upemba | Lake Upemba | Congo ( Dem. Rep. ) |
| Upper Klamath | Upper Klamath Lake | USA |
| Upper Lough Erne | Upper Lough Erne | UK |
| Urmia | Lake Urmia | Iran |
| Uru Uru | Lake Uru Uru | Bolivia |
| Ust-Ilimskoye | Ust-Ilimskoye Reservoir | Russia |
| Uvildy | Lake Uvildy | Russia |
| Uvs | Lake Uvs | Mongolia |