The municipality was located along the western shore of the Trondheimsfjorden and on the southwestern end of the Beitstadfjorden.

In 1991, the Skarnsund Bridge on Norwegian County Road 755 was completed, eliminating the need for a ferry across the Skarnsundet strait.

[5] The Skarnsund bridge was opened by King Harald V on 19 December 1991, after he had taken the last ferry across the fjord.

[8] During the 1960s, there were many municipal changes across Norway due to the work of the Schei Committee.

On 3 November 1917, a royal resolution changed the spelling of the name of the municipality to Mosvik, removing the definite form ending -en.

[10] The coat of arms was granted on 13 July 1984 and it was in use until 1 January 2012 when it became part of Inderøy Municipality.

The official blazon is "Argent, two piles throughout reversed vert" (Norwegian: I sølv to grønne spisser).

The highest point in the municipality is the 502.45-metre (1,648.5 ft) tall mountain Storknuken.

The municipal council (Kommunestyre) of Mosvik was made up of representatives that were elected to four year terms.