Stenungsund Municipality (Stenungsunds kommun) is a municipality in Västra Götaland County in western Sweden. Its seat is located in the town of Stenungsund. The municipality is situated by the sea inside the islands Orust and Tjörn and traversed by the European route E6 and Bohus Line, in which it has three stops (Stora Höga, Stenungsund and Svenshögen).

The municipality was formed through amalgamation in 1952. In 1971 a parish from a dissolved municipality was added.

The coat of arms was registered in 1977. The device in the upper half is a hydrocarbon molecule, which alludes to the petrochemical industry in the municipality.

Smaller localities (villages):

The seat is located right by the European route E6 highway and the railway Bohus Line, Bohusbanan.

In 2006, archaeological excavations in the area revealed a series of burial sites dating between 1 AD and 300 AD.

This is a demographic table based on Stenungsund Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.^[3]

In total there were 27,522 residents, including 20,770 Swedish citizens of voting age.^[3] 41.8% voted for the left coalition and 56.8% for the right coalition. Indicators are in percentage points except population totals and income.

• Hogia (Official website), one of Sweden's largest native computer software developers

Since the 1950s, Stenungsund Municipality has become the center for the petrochemical industry. Its distinguished silhouette is four giant chimneys, belonging to a large power plant.

The following sports clubs are located in Stenungsund Municipality:

• Stenungsunds IF
• Vallens IF
• Stss, Tjörn Runt
• Stenungsund HF
• Stenungsunds FC^[4]

• Stenungsund excavations