Kadrina is a small borough in Lääne-Viru County, in northern Estonia. It serves as the administrative centre of Kadrina Parish. Historically it has also been known by the German name Sankt Katharinen.
The settlement lies at the crossing point of several transport routes: the Tallinn–Saint Petersburg (Tallinn–Narva) railway, the Pärnu–Rakvere road, and the Loobu River. The nearest towns are Rakvere and Tapa.