Viļaka Municipality (Latvian: Viļakas novads, Latgalian: Vileks nūvods) is a former municipality in Latgale, Latvia. The municipality was formed in 2009 by merging parts of the former Balvi district: Kuprava Parish, Medņeva Parish, Susāji Parish, Šķilbēni Parish, Vecumi Parish, Žīguri Parish and Viļaka town.

The administrative centre of the municipality was Viļaka. The population in 2020 was 4,472.

On 1 July 2021, Viļaka Municipality ceased to exist and its territory was merged into Balvi Municipality as its component subdivisions.

57°10′N 27°40′E / 57.167°N 27.667°E / 57.167; 27.667