Viļaka (, ; ; ; ; , Vilyaka; Yiddish: ויליאקי, Vilyaki) is a town in Balvi Municipality in the Latgale region of Latvia. The population in 2020 was 1,223. Viļaka is located 246 km from Riga, and 8 km from the border with Russia.

It hosts the power grid interconnector between the Baltic states and Russia, which was disconnected in February 2025.

See also List of cities and towns in Latvia Viļaka Castle

References