Croatia–Slovenia relations

The foreign relations between Croatia and Slovenia are bound together by shared geopolitical and cultural history, ethnogenesis and ethnolinguistics, geography as well as shared modern political ideologies and geopolitical alignment. Both states established diplomatic relations in 1992, following the dissolution of Yugoslavia and the independence of Croatia. Modern relations are warm and friendly, with collaboration across a variety of initiatives. There are limited disputes over their border and sovereign rights over certain nuclear and economic assets. The countries share 670 km (420 mi) of common border. They are perennially each other's largest trading partners on an import-export basis.

As the two wealthiest former Yugoslav republics by GDP-per-capita, Croatia and Slovenia were the first two countries to achieve independence, both later joining the European Union (EU) in 2004 and 2013, respectively. Both are close military allies, sharing membership in NATO as well as the EU defense forces. Croatia has an embassy in Ljubljana and two honorary consulates in Maribor and Koper. Slovenia has an embassy in Zagreb and an honorary consulate in Split.