Area of 56,594 sq km.

Bordering countries are Slovenia, Hungary, Bosnia-Herzegovina, Serbia and Montenegro. There are 1,777 km of mainland coastline on the Adriatic Sea, and some 1,200 Adriatic Sea islets and islands. Some of the larger islands are Cres, Krk, Hvar, Brač and Korčula (the most populated one).

There has been a long dispute over borders with Slovenia. In May 2011 Croatia and Slovenia jointly submitted their arbitration agreement for registration with the United Nations. The arbitration agreement was signed by both prime ministers in November 2009 but was subject to a complex ratification process. A referendum in Slovenia narrowly endorsed the agreement in May 2010. The treaty specified that arbitration would begin at the moment Croatia signed its accession into the European Union. The boundary agreement, in which most of the Bay of Piran would have been ceded to Slovenia and several Slovenian villages restored to Croatia, still remains uncompleted.  There is also still also a dispute with Bosnia-Herzegovina over borders, particularly where it affects access to the sea.

Largest cities – Zagreb (capital - population 687 thousand), Split (166 thousand), Rijeka (127 thousand), Osijek (105 thousand) (population data from 2011)

Main rivers - Sava, Drava, Kupa - each reaches the Dunav (Danube), which forms the eastern border with Serbia.

Terrain:  along the Hungarian border there are flat plains, near Adriatic coastline there are forested highlands and mountains, with Dinara at 1,830 metres the highest point.
The coastline is rocky. Most of the Adriatic Sea islands lie off the coast of Croatia.

Natural resources – oil, some coal, bauxite, low-grade iron ore, calcium, gypsum, natural asphalt, silica, mica, clays, salt and hydropower.