| Lopan | |||||||||||
| Subdivision Type1: | Country | ||||||||||
| Subdivision Name1: | Russia, Ukraine | ||||||||||
| Length: | 93km (58miles) | ||||||||||
| Mouth: | Udy | ||||||||||
| Mouth Coordinates: | 49.937°N 36.2032°W | ||||||||||
| Progression: | Udy→ | ||||||||||
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The Lopan (Russian and Ukrainian: Лопань) is a river that rises in Belgorod Oblast of Russia and flows across the Russian-Ukrainian border into Kharkiv Oblast where it joins the Udy in Kharkiv. The river is long. The river Kharkiv is one of its tributaries.