Ustka (Polish pronunciation: [ˈustka], Kashubian: Ùskô, German: Stolpmünde) is a spa town in the Middle Pomerania region of northern Poland with 17,100 inhabitants (2001).

The first settlers arrived at present-day Ustka as early as the 9th century, and established a fishing settlement with the original name of Ujść.

The area at the mouth of the river Słupia was ceded to the nearby city of Słupsk in 1337 with the purpose of building a fishing harbour and a commercial port there to the Baltic Sea.

The town was given to Brandenburg-Prussia following the partition of the Duchy of Pomerania after the Treaty of Westphalia in 1648, and from the 18th century it formed part of the Kingdom of Prussia.

The current shape of the harbour is a result of an investment between 1899 and 1903 creating the largest port between Stettin (Szczecin) and Danzig (Gdańsk).

During World War II, the Germans operated a forced labour subcamp of the Stalag II-B prisoner-of-war camp for Allied POWs.

After World War II, the new Polish authorities took steps to determine an official name to replace the German 'Stolpmünde'.

For a number of years, following the political changes in Poland, the town has won a string of local awards for the best summer place in the country.

The Western Beach runs into the territory of the Navy Training Centre (CSSMW, Centrum Szkolenia Specjalistów Marynarki Wojennej), access to which was restricted beyond a certain point in the west.

However, much more popular, developed and facilitated with numerous bars, restaurants, a concert hall, and a waterfront promenade (built in 1875), the Eastern Beach is more prone to "abrasia" (the erosion of the sea).

There is a new (built in 2013), swing pedestrian bridge over the river Słupia - open for 15 minutes every hour, that links both beaches every day.

Road-rail bridge in Ustka is located outside the centre, in the western part of the town - close to the main railway station.