Apatin is a city in the Vojvodina administrative region of Serbia and Montenegro, located in the West Backa District, .

Apatin is the administrative, economic, culturical, educational and tourist center of the municipality of Apatin (333 km², population 34,000).

The Municipality of Apatin is located on the left bank of the Danube river (natural border with Croatia), between the Municipality of Sombor (on the north) and Municipality of Odzaci (on the southeast). As many as 24 ethnic groups live in Apatin, including Serbs (61% of the population), Croats (30%), Hungarians, Romanians, Romas, Montenegrins, Macedonians, Muslims, Albanians, Germans, and Slovaks.

Near the city of Apatin lies the Junakovic spa. It is a modern and well-equipped rehabilitation and recreation center with sports fields, outdoors pools, indoor therapy, and saunas.

Major buildings in Apatin include the Catholic church of The Assumption of the Virgin Mary (built in the 18th century), the new Orthodox Christian temple, the city hall, and the Speiser mausoleum.

The largest companies in Apatin today are the Apatinska Pivara AD (brewery, built in 1756), Rapid, Jedinstvo, and Brodogradiliste Apatin.