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Poland Sniardwy Lake.jpg
Location Masurian Lake District
Coordinates 53°46′N 21°45′E / 53.767°N 21.750°E / 53.767; 21.750Coordinates: 53°46′N 21°45′E / 53.767°N 21.750°E / 53.767; 21.750
Type Glacial lake
Basin countries Poland
Max. length 22.1 km (13.7 mi)
Max. width 13.4 km (8.3 mi)
Surface area 113.8 km2 (43.9 sq mi)
Average depth 6.5 m (21 ft)
Max. depth 23 m (75 ft)
Water volume 0.65 km3 (530,000 acre·ft)
Surface elevation 117 m (384 ft)
Islands 8

Śniardwy (German: About this sound der Spirdingsee ) is a lake in the Masurian Lake District of the Warmian-Masurian Voivodeship, Poland. It is the largest lake in Poland with an area of 113.8 square kilometres (43.9 sq mi). It is 22.1 kilometres (13.7 mi) long and 13.4 kilometres (8.3 mi) wide. The maximum depth is 23 metres (75 feet). There are eight islands on the Śniardwy lake.[1]


Śniardwy was formed by retreating ice sheet and draining floodwaters occurring as the result of ice calving ahead of the receding glacier. Among the eight islands are: Szeroki Ostrów, Czarci Ostrów, Wyspa Pajęcza, Wyspa Kaczor and others. Surrounding settlements include Popielno, Głodowo, Niedźwiedzi Róg, Okartowo, Nowe Guty, Zdęgowo and Łuknajno.[1]

Among the many inlets, two are named as separate lakes: Warnołty and Seksty. Śniardwy connects with the following lakes: Tuchlin, Łuknajno, Mikołajskie, Roś, Białoławki and Tyrkło. It is surrounded by the system of canals known as Kanały Mazurskie (Masurian Canals), with numerous sluices. Together, they form the Polish Masurian Lake District.[1]


  • J. Szynkowski, Mazury. Przewodnik, Kengraf Kętrzyn, 2003