Trinidad and Tobago-Barbados: Barbados and Trinidad and Tobago abide by the April 2006 Permanent Court of Arbitration decision delimiting a maritime boundary and limiting catches of flying fish in Trinidad and Tobago's EEZ

Trinidad and Tobago-Barbados-Guyana-Venezuela: in 2005, Barbados and Trinidad and Tobago agreed to compulsory international arbitration under UN Convention on the Law of the Sea challenging whether the northern limit of Trinidad and Tobago's and Venezuela's maritime boundary extends into Barbadian waters; Guyana has expressed its intention to include itself in the arbitration, as the Trinidad and Tobago-Venezuela maritime boundary may also extend into its waters

Ukraine-Belarus: in 1997, Ukraine and Belarus signed a boundary delimitation treaty; the instruments of ratification were exchanged in 2013; a joint commission should be established to enable the actual demarcation to begin

Ukraine-Hungary: hundreds of thousands of Ukrainian refugees are crossing the border to Hungary to escape the Russian invasion in their country

Ukraine-Moldova: hundreds of thousands of Ukrainian refugees are crossing the border to Moldova to escape the Russian invasion in their country; Ukraine and Moldova signed an agreement officially delimiting their border in 1999, but the border has not been demarcated due to Moldova's difficulties with the break-away region of Transnistria; Moldova and Ukraine operate joint customs posts to monitor transit of people and commodities through Moldova's Transnistria Region, which remains under the auspices of an Organization for Security and Cooperation in Europe-mandated peacekeeping mission comprised of Moldovan, Transnistrian, Russian, and Ukrainian troops

Ukraine-Poland: hundreds of thousands of Ukrainian refugees are crossing the border to Poland to escape the Russian invasion in their country

Ukraine-Romania: hundreds of thousands of Ukrainian refugees are crossing the border to Romania to escape the Russian invasion in their country, the ICJ in 2009 ruled largely in favor of Romania in its dispute submitted in 2004 over Ukrainian-administered Zmiyinyy/Serpilor (Snake) Island and Black Sea maritime boundary delimitation; Romania opposes Ukraine's reopening of a navigation canal from the Danube border through Ukraine to the Black Sea

Ukraine-Russia: the dispute over the boundary between Russia and Ukraine through the Kerch Strait and Sea of Azov is suspended due to the occupation of Crimea by Russia

Ukraine-Slovakia: tens of thousands of Ukrainian refugees are crossing the border to Slovakia to escape the Russian invasion of their country

dispute with Equatorial Guinea over Mbane Island and lesser islands in the Corisco Bay submitted to ICJ in 2016