| Type: | commune |
| County: | Maramureș |
| Poienile de sub Munte | |
| Other Name: | Русь Поляни |
| Established Date: | 1353 (first attested) |
| Leader Name: | Alexa Chifa[1] |
| Leader Party: | USR |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 47.8167°N 50°W |
| Elevation: | 530 |
| Elevation Max: | 1957 |
| Area Total: | 293.36 |
| Population Total: | auto |
| Postal Code: | 437220 |
| Area Code: | (+40) 02 62 |
Poienile de sub Munte (Ukrainian: Русь Поляни, Поляни or Полонина; Русь Поляни; Hungarian: Ruszpolyána or Havasmező; Polish: Ruska Polana; German: Reußenau; Yiddish: פאליען-ריסקווה|Polien Riskeve) is a commune in Maramureș County, Maramureș, Romania. It is one of the oldest places in Maramureș, being mentioned for the first time in 1353. It is the biggest commune in the county and is composed of a single village, Poienile de sub Munte.
The commune is located in the northeastern part of Maramureș County, on the border with Ukraine, east of the city of Sighetu Marmației and northeast of the county seat, Baia Mare. It is situated at an altitude of, nestled within the, with an altitude of being reached at . The Maramureș Mountains Natural Park is partly located on the territory of the commune. The river Ruscova and its tributaries, the rivers Socolău and Cvașnița, flow through Poienile de sub Munte.
is a Ruthenian hilltop settlement perched at about on a mountain pass without an access road, where farmers live without machines, electricity, or vehicles.
Etymology of the name of the locality: from Poiana (< subst. poiana "light in the forest", of Slavic origin) + de + sub + Munte (< appellative mountain < lat. mons, -tis). Literally, The Meadows under the Mountain.
At the 2021 census, the commune had a population of 9,291, of which 90.83% were Ukrainians and 1.54% ethnic Romanians.[2]