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

At the time of the municipal dissolution, it was part of the Stadsbygd prestegjeld and the Nord-Fosen prosti (deanery) in the Diocese of Nidaros.

[8] The municipality was located on the southwest side of the Trondheimsfjorden, about 35 kilometres (22 mi) west of the city of Trondheim.

The highest point in the municipality was the 656.2-metre (2,153 ft) tall mountain Hestgrovheia, just west of the village of Lensvik.

The municipal council (Herredsstyre) of Lensvik was made up of 13 representatives that were elected to four year terms.

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