Bad Aibling (German: [ˈba:t ˌʔaɪ̯blɪŋ] ⓘ) is a spa town and former district seat in Bavaria on the river Mangfall, located some 56 km (35 mi) southeast of Munich.

In the same year, the historical Ludwigsbad spa hotel, the nucleus of Bad Aibling's health resort business, burned down due to arson.

The town of Bad Aibling, with about 18,000 inhabitants, is at 498 m (1,634 ft) above sea level and covers an area of 41.55 km2 (16 sq mi).

Bad Aibling consists of the neighborhoods (Stadtteile) of Abel, Adlfurt, Bad Aibling Mitte, Berbling, Ellmosen, Fachendorf, Gröben, Harthausen, Haslach, Heimathsberg, Heinrichsdorf, Holzhausen, Köckbrunn, Markfeld, Mietraching, Mitterham, Moos, Natternberg, Thalacker, Thürham, Unterheufeld, Weg, Westen, Westerham, Willing, and Zell.

In Bad Aibling there are several large spa hotels and rehabilitation hospitals that rely on peat pulp as a basic treatment.

The Echelon Open Air & Indoor Festival is an electro-, techno and house-festival that has taken place in Bad Aibling annually in August since 2009.