Płoska – is a river in east Poland in Podlaskie Voivodeship, a left tributary of the Supraśl River, with a length of 23,6 kilometres and the basin area of 216 km2. There is good river for rafting. The largest tributary is Świniobródka.

Płoska
Płoska near village Zajma
Location
CountryPoland
Physical characteristics
Source 
 • locationnear village Tatarowce
Mouth 
 • location
Supraśl near Krzemienne
 • coordinates
53°11′38″N 23°24′28″E / 53.1939°N 23.4079°E / 53.1939; 23.4079
Length23.6 km (14.7 mi)
Basin size216 km2 (83 sq mi)
Discharge 
 • average0.92 m3/s (32 cu ft/s)
Basin features
ProgressionSupraślNarewVistulaBaltic Sea