The Trnava Region (Trnavský kraj, ; Nagyszombati kerület; Tyrnauer Landschaftsverband) 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.
In the lower, west part of Slovakia, the Trnava region forms a territorial band between the Bratislava Region and the rest of Slovakia, between Austrian and Czech borders in the north and north-west and the Hungarian border in the south. The part north of the Little Carpathians is part of the Záhorie Lowland, with its two subdivisions: hilly Chvojnická pahorkatina and flat Borská nížina. In addition to these, the Myjava Hills and the White Carpathians reach into the area. The fertile Danubian Lowland is located south of the Little Carpathians, again with two subdivisions: the Danubian Flat in the south, containing river island of Žitný ostrov (Rye Island) and the Danubian Hills in the north, where it also borders the Považský Inovec range app. on the line Hlohovec - Piešťany - border with the Trenčín Region. Major rivers are the Danube on the Hungarian border, with part of the Gabčíkovo Dam, Little Danube, which creates with Danube the island of Žitný ostrov, Váh in the east, Dudváh in the centre, and Morava River in the north-west, along the Austrian and Czech borders. The region borders: Austrian Lower Austria and Czech South Moravian Region in the north-west, Trenčín Region in the north, Nitra Region in the east, Hungarian Győr-Moson-Sopron county in the south and Bratislava Region in the west.
