Čadca (pronunciationⓘ; until 1918 Čatca, Czača, Hungarian: Csaca, Polish: Czadca) is a district town in northern Slovakia, near the border with Poland and the Czech Republic.

It is located south of the Jablunkov Pass, surrounded by the Javorníky, Kysucké Beskydy and Turzovská vrchovina mountain ranges.

It lies in the valley of the Kysuca river, around 30 kilometres (19 miles) north of Žilina and is part of the historic region of Kysuce.

The town was established in the 17th century; the first written reference dates back to 1565 as Tzaczcka.

[8] One of the world's largest (and last) producers of vacuum tubes, JJ Electronic has a factory in Čadca.