Međimurje County is a triangle-shaped county in the northernmost part of Croatia, roughly corresponding to the historical and geographical region of Međimurje. It is the smallest Croatian county by size, as well as the most densely populated. The county's seat and main urban centre is Čakovec.

The counties of Croatia are the first-level administrative subdivisions of the Republic of Croatia. Since they were re-established in 1992, Croatia has been divided into 20 counties and the capital city of Zagreb, which has the authority and legal status of both a county and a city. As of 2015, the counties are subdivided into 128 cities and 428 municipalities. The divisions have changed over time since the medieval Croatian state. They reflected territorial losses and expansions; changes in the political status of Dalmatia, Dubrovnik and Istria; and political circumstances, including the personal union and subsequent development of relations between the Kingdom of Croatia-Slavonia and the Kingdom of Hungary.