The Łeba (German: Leba), a river in Middle Pomerania (Poland), originates near the village of Borzestowo west of Kartuzy, passes through Łebsko Lake and empties into the Baltic Sea.

From 1308, after the Teutonic takeover of Danzig (Gdańsk) and the Treaty of Soldin (Myślibórz), the river formed the western border of the Order's Pomerelian lands with the Duchy of Pomerania until 1466, when Poland regained Pomerelia.

From that time the mouth of the Łeba on the Baltic coast marked the north-easternmost point of the Holy Roman Empire till its dissolution in 1806.

The adjacent Pomerelian lands of Lauenburg and Bütow (Lębork i Bytów) became a fief of the Polish Crown with the Second Peace of Thorn (1466).

There is an abundance of architectural and natural attractions near Łeba, above all the Słowiński National Park with its moving sand dunes, about 8 km west of the city.