The Romania–Ukraine border is the state border between Romania and Ukraine. It consists of both a land and a maritime boundary. The total border length is 613.8 km (381.4 mi) including 292.2 km (181.6 mi) by rivers and 33 km (21 mi) by the Black Sea. It is part of the external border of the European Union (since Romania's accession to the EU in January 2007).
The maritime delimitation between the two countries, including the continental shelf and exclusive economic zone was adjudicated at the International Court of Justice (ICJ) in 2009.