The official blazon is "Vert, three chevronels embowed argent" (Norwegian: I grønt tre innbøyde sølv sparrer).

This means the arms have a green field (background) and the charge is three chevrons with a slight curve to them.

The charge has a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used.

Some of the major islands include Bjørøya, Lauvøya, Villa, Halmøya, and Kvernøya.

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

The tables below show the current and historical composition of the council by political party.

Here is a list of people who have held this position:[33][34] Flatanger is home to some of the world's hardest sport climbs that are located in the nearby Hanshelleren Cave.

In 2012, Adam Ondra completed the redpoint of Change [fr], which became the first-ever rock climbing route in history to be graded at 9b+ (5.15c).