Trnava is a city in western Slovakia, 47 km (29 mi) to the northeast of Bratislava, on the Trnávka river. It is the capital of the Trnava Region and the Trnava District. It is the seat of a Roman Catholic archbishopric. The city has a historic center. Because of the many churches within its city walls, Trnava has often been called "Little Rome", or more recently, the "Slovak Rome".

The Trnava Region is one of the eight Slovak administrative regions. It was established in 1996, before which date, most of its districts were parts of Bratislava Region which was established on the founding of Czechoslovakia in 1923. It consists of 251 municipalities, from which 16 have a town status. It is the second most densely populated region in Slovakia.