[6] The scythe theme of Alavieska's coat of arms refers to the extensive meadows in the municipality's territory.

The coat of arms was designed by Kaj Kajander, and the Alavieska municipal council approved it at its meeting on September 20, 1960.

In 1967, Alavieska had six legally recognized villages (henkikirjakylät):[9] On the 31 December 2024, the municipality has a population of 2,412 (238th largest in Finland).

The data refers to the conditions on 31 December of the current year according to the territorial division on 1 January 2022.

Finnish (suomi), Swedish (ruotsi) and Sami (saame) count as indigenous languages as they have official status in the country.