Modrý Kameň is a town and municipality in the Veľký Krtíš District of the Banská Bystrica Region of southern Slovakia.

The Banská Bystrica Region is one of the eight regions of Slovakia. It is the largest of the eight regions by area, and has a lower population density than any other region. The Banská Bystrica Region was established in 1923; its borders were last adjusted in 1996. Banská Bystrica consists of 514 municipalities, 24 of which have town status. Its administrative center is the eponymous town of Banská Bystrica, which is also the region's largest town. Other important towns are Zvolen and Lučenec.