Again on 1 July 1955, the Bjerkaker area of Tromsøysund (population: 1,583) was transferred to the city of Tromsø.

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

In 1860, the name of the municipality was changed to Tromsøsundet, after the local Tromsøysundet strait.

[12] On 6 January 1908, a royal resolution changed the spelling of the name of the municipality to Tromsøysund.

The official blazon is "Gules, a two-masted ship Or" (Norwegian: På rød bunn et tomastet gull skip).

This means the arms have a red field (background) and the charge is a two-masted ship.

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

It was part of the Tromsøysund prestegjeld and the Tromsø domprosti (arch-deanery) in the Diocese of Nord-Hålogaland.

The highest point in the municipality was the 1,169-metre (3,835 ft) tall mountain Bentsjordtinden.

The municipal council (Kommunestyre) of Tromsøysund was made up of 53 representatives that were elected to four year terms.