Tatabánya (Hungarian pronunciation: [ˈtɒtɒbaːɲɒ]) is a city of 69,988 inhabitants in northwestern Hungary, in the Central Transdanubian region. It is the capital of Komárom-Esztergom County.

The city is located in the valley between the Gerecse and Vértes Mountains, some 55 km (34 mi) from the capital. By virtue of its location, the city is a railway and road junction. The M1 (also European routes E60, E75) motorway from Vienna to Budapest passes through the outer city limits, and the Vienna-Budapest railway line also passes through the city.

Archaeological findings prove that humans have been living here since the Stone Age. The three historic predecessor settlements of Tatabánya are Alsógalla, Felsőgalla and Bánhida. Bánhida is the earliest settlement, it was first mentioned in 1288.^{[citation needed]}

In the 16th century the Ottoman Turks, occupied the area. Around this time the inhabitants became Protestants. Later, its feudal lords, the Esterházys populated the area with Roman Catholic German and Slovak settlers.