Lake Roś

53°40′1″N 21°53′36″E / 53.66694°N 21.89333°E / 53.66694; 21.89333Primary inflowsSwięcek and KonopkaPrimary outflowsPisaBasin countriesPolandSurface area18.9 km² (7.3 sq mi)Max. depth31.8 m (104 ft)

Lake Roś (Polish: Jezioro Roś, German: Roschsee) is a lake in the Masurian Lake District of the Warmian-Masurian Voivodeship of Poland. This S-shaped glacial lake has an area of 18.9 km² and a depth of 31.8 metres. The Swięcek and Konopka rivers flow into the lake, while the Pisa River flows out of it. The largest town on the lake is Pisz.