Croatia-Slavonia was an autonomous kingdom within the Lands of the Crown of Saint Stephen (Transleithania), the Hungarian part of the dual Austro-Hungarian Empire.

[2][3] The river Drava formed its northern border[4] after Međimurje became part of Hungarian Zala County in 1720.

It was divided into four (political) districts ((politische) Bezirke):[8] In 1854, as part of Bach's absolutism, it was restructured again, absorbing much of Križevci County.

[9] The cities of Kreutz (Križevci), Kopreinitz (Koprivnica) and Warasdin/Varasdin (Varaždin) themselves were city-districts (Stadtbezirke) separate from the districts listed above (which were Landbezirke).

In 1886 its territory was altered again, with some returned to Zagreb and some more gained from Križevci (which became part of Bjelovar-Križevci County in the same reform).