This arrangement was not well-liked by the local residents so after a few years, the municipalities began to ask to undo the merger.

The official blazon is "Vert, three bells Or" (Norwegian: I grønt tre gull bjeller, 2-1).

The charge has a tincture of Or which means it is commonly colored yellow, but if it is made out of metal, then gold is used.

The design symbolizes both traditional and modern business life in the mountain municipality of Os.

The municipal flag has the same design as the coat of arms, although the bells are slightly off centre, closer to the flagpole.

The municipal council (Kommunestyre) of Os is made up of 15 representatives that are elected to four year terms.

The mayors of Os:[31] Lakes in the region include Flensjøen, Femunden, and Siksjøen.