[1] Until 1918, the district was part of the county of Kingdom of Hungary of Trencsén.

The central part of the district, the Trenčianska kotlina basin and a part of the Ilavská kotlina basin are skirted by the White Carpathians to the west and the Strážov Mountains and the Považský Inovec in the east.

In the past also the textile and clothing industries were of importance.

In the Trenčianske Teplice spa locomotive and nervous system diseases are treated.

The highest municipality is Dolná Poruba at 427 metres (1,401 ft) above sea level.