Laucesa (Lithuanian: Laukesa, Polish: Łaukiesa, German: Lautze) is a 31-kilometre (19 mi) long river in Lithuania and Latvia.
[1] It originates near Smėlynė [lt] from the Laukesas [lt] lake situated on the Latvia–Lithuania border.
It first flows east along the state border for about 2 kilometres (1.2 mi).
It then turns northeast and flows into the Daugava river near Daugavpils.
[1]