Cavnic (Hungarian: Kapnikbánya; German: Kapnik) is a former mining town located in the valley of the river Cavnic, 26 km (16 mi) east of Baia Mare, in Maramureș County, northern Romania.

Part of the Baia Mare metropolitan area, the town covers 47.17 km2 (18 sq mi), at altitudes ranging from 500 to 1,050 m (1,640 to 3,440 ft) above sea level.

In the 1910 Census of the Kingdom of Hungary, Kapnikbánya (as it was then called) was in Szatmár County, Nagybánya district.

The town's mines tended to close and reopen, often not remaining operational for any great length of time.

Two ski slopes were built at Icoana, and the town gained motels, boardinghouses and a hotel to take advantage of its touristic potential.