| Luzha | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 159km (99miles) |
| Mouth: | Protva |
| Mouth Coordinates: | 55.0611°N 36.5731°W |
| Progression: | Protva→ |
| Basin Size: | 1400km2 |
The Luzha (Russian: Лужа) is a river in Kaluga Oblast, Russia, which originates in Moscow Oblast. It is a right tributary of the Protva (in the Oka river basin).[1] The Luzha has a length of 159km (99miles) and a drainage basin area of 1400km2.[2] The Luzha freezes up in November (rarely in December) and breaks up in April. The town of Maloyaroslavets, the site of an important battle in 1812 during the French invasion of Russia, is located on the Luzha.