Croatia is situated between central, southern and eastern Europe. It has a rather peculiar shape that resembles a crescent or a horseshoe which helps account for its many neighbours: Slovenia, Hungary, Serbian part of Serbia and Montenegro, Bosnia and Herzegovina, Montenegrin part of Serbia and Montenegro, and Italy across the Adriatic. Its mainland territory is split in two non-contiguous parts by the short coastline of Bosnia and Herzegovina around Neum.

Its terrain is diverse, containing:
plains, lakes and rolling hills in the continental north and northeast (Central Croatia and Slavonia, part of the Pannonian plain);
densely wooded mountains in Lika and Gorski Kotar, part of the Dinaric Alps;
rocky coastlines on the Adriatic Sea (Istria, Northern Seacoast and Dalmatia).

Croatia has a mixture of climates. In the north and east it is continental, Mediterranean along the coast and a semi-highland and highland climate in the south-central region.