Čakovec Castle or Zrinski Castle (Croatian: Čakovečka utvrda or Stari grad Zrinskih or Hungarian: Csáktornyai vár or Zrínyi-kastély) is a medieval fortification in the middle of the town of Čakovec, the administrative seat of Međimurje County, northern Croatia.

The castle is located in the Zrinski Park, not far from the city's central square, and is the biggest fortification in Međimurje County.

The first fortification was built in the 13th century by Count Csák I Hahót, after whom the city of Čakovec is named.

Nikola IV Zrinski, Ban (viceroy) of Croatia and hero of Siget, was granted the castle together with the whole area of Međimurje on 12 March 1546 from King Ferdinand as a compensation for his battles against the Ottomans.

In 1660 the castle was visited by Evliya Çelebi, Turkish traveller and writer, and in 1661 by Jacobus Tollius, Dutch philologist.