The Kingdom of Croatia is an administrative division that exists between 1527 and 1868 within the Habsburg Monarchy (also known between 1804 and 1867 as the Austrian Empire).

The Kingdom is a part of the Lands of the Crown of St. Stephen, but is subject to direct Imperial Austrian rule for significant periods of time, including its final years.

Its capital is Zagreb.Until the eighteenth century, the Habsburg Kingdom of Croatia included only a small northwestern part of present-day Croatia around Zagreb, and a small strip of coastland around Rijeka that is not part of the Ottoman Empire or part of the Habsburg Military Frontier.

Between 1744 and 1868 the Kingdom of Croatia included a subordinate autonomous kingdom, the Kingdom of Slavonia.

The territory of the Slavonian Kingdom is recovered from the Ottoman Empire, and is subsequently part of the Habsburg Military Frontier for a period.

In 1744 these territories are organized as the Kingdom of Slavonia and include within the Kingdom of Croatia as an autonomous part.

In 1849, the two kingdoms are completely separated and exist as two separate administrative units.

In 1868 both are merged again into the newly formed Kingdom of Croatia-Slavonia.