Trelleborg Municipality (Trelleborgs kommun) is the southernmost municipality of Sweden, in Skåne County. Its seat is located in the city Trelleborg.

The present municipality was created in 1967 through the amalgamation of the City of Trelleborg with five rural municipalities. It consists of over thirty original local government units.

The municipality boasts 35 kilometers of predominantly sandy beach in the south, beech woods to the north, and in between one of the most fertile soils in the world.^{[citation needed]}

There are 8 urban areas (also called a Tätort or locality) in Trelleborg Municipality.

In the table they are listed according to the size of the population as of December 31, 2005. The municipal seat is in bold characters.

This is a demographic table based on Trelleborg 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 46,136 residents, including 34,670 Swedish citizens of voting age.^[3] 37.3% voted for the left coalition and 61.4% for the right coalition. Indicators are in percentage points except population totals and income.

Below are the results since the 1973 municipal reform listed. Between 1988 and 1998 the Sweden Democrats' results were not published by the SCB due to the party's small size nationwide. "Turnout" denotes the percentage of the electorate casting a ballot, but "Votes" only applies to valid ballots cast.

Municipal work is the most common form of employment in Trelleborg, engaging over 4,000 individuals across 400 diverse roles. Additionally, the Trelleborg municipality ranks among the top ten largest employers in the Scania province.^[18][19]