Petržalka (Slovak pronunciation: [ˈpetr̩ʐalka]; German: Engerau / Audorf; Hungarian: Pozsonyligetfalu) is the largest borough of Bratislava, the capital of Slovakia.

Situated on the right bank of the river Danube, the area shares a land border with Austria, and is home to around 100,000 people.

Before the 18th century, the territory of present-day Petržalka consisted of several regularly flooded islands and was not suitable for larger permanent settlement.

The deed of donation of Andrew II of Hungary (1225) mentions a property Wlocendorf/Fluecendorf, abandoned village of Pechenegs and several local place names including the Peceneg Island (Beseneusciget, now national protected area Pečniansky les) and the Magyar Island (Mogorsciget).

Pecheneg mercenaries on guard duty near the river Danube were probably the first permanent settlers, but the ford was protected also by other ethnic groups like Székelys and Ruthenians.

It became a popular recreation area with the oldest public park in Central Europe (now Sad Janka Kráľa, founded in 1776).

At the beginning of August, Czechoslovakia got permission to correct the borders for the strategic reasons, mainly to secure the port and to prevent a potential attack of the Hungarian Army on the town.

On the night of 14 August 1919 barefoot Czechoslovak soldiers silently climbed to the Hungarian side of the bridge, captured the guards and annexed Petržalka without a fight.

Non-Germans were not allowed to participate in public life, and the Gestapo arrested citizens who promoted ideas opposing Nazism, including those active before the occupation.

[7] From November 1944 to March 1945 – Petržalka (Engerau) was the site of a labour camp for Hungarian Jews, who were deployed at the construction of the Südostwall.

[14] Petržalka is primarily a residential area, with most people living in blocks of flats called paneláks, a neologism for buildings built from concrete panels joined together to form the structure, which were widely deployed throughout the Eastern Bloc during the communist era.

[23] Petržalka is also a home to Evanjelické lýceum - lutheran educational institution that played important part in development of slovak culture and national identity.

Bratislava-Petržalka railway station is located in the western part of the borough and is used primarily for international traffic and, since 1999, for trains to and from Vienna.

Instead, a high-speed tram (light rail) line was planned but its construction was postponed multiple times because it involved a complete reconstruction of Starý most bridge.