Ireland-Denmark: Ireland, Iceland, and the UK dispute Denmark's claim that the Faroe Islands' continental shelf extends beyond 200 nm; Iceland, Norway, and the Faroe Islands signed an agreement in 2019 extending the Faroe Islands’ northern continental shelf area

Philippines-Taiwan-China-Malaysia-Vietnam: Philippines claims sovereignty over Scarborough Reef (also claimed by China together with Taiwan) and over certain of the Spratly Islands, known locally as the Kalayaan (Freedom) Islands, also claimed by China, Malaysia, Taiwan, and Vietnam; the 2002 "Declaration on the Conduct of Parties in the South China Sea," has eased tensions in the Spratly Islands but falls short of a legally binding "code of conduct" desired by several of the disputants; in March 2005, the national oil companies of China, the Philippines, and Vietnam signed a joint accord to conduct marine seismic activities in the Spratly Islands

Philippines-Malaysia: Philippines retains a dormant claim to Malaysia's Sabah State in northern Borneo based on the Sultanate of Sulu's granting the Philippines Government power of attorney to pursue a sovereignty claim on his behalf; the disagreement resurfaced in September 2020 , when Malaysia’s submission to the UN about extending its continental shelf was sharply countered by the Philippines because it included the disputed territory

Philippines-Palau: maritime delimitation negotiations continue with Palau, as of March 2022

Slovakia-Austria: none identified

Slovakia-Czechia: none identified

Slovakia-Hungary: initiated by the 1977 Budapest Treaty, Hungary and formerly Czechoslovakia agreed to a hydroelectric dam project on the Danube with dams to be constructed at Gabcikovo (Slovakia) and Nagymaros (Hungary) to prevent floods, improve river navigability, and to generate electricity; when Hungary suspended work on the project until its environmental impact could be assessed, Slovakia continued working on it and adopted a pared down strategy to divert the Danube so that all construction was within Czechoslovakian territory; Hungary terminated the project on environmental and economic grounds in 1989, and in 1992 both countries took the matter to the International Court of Justice (ICJ); the ICJ found largely in favor of then Slovakia, finding Hungary had breached their agreement; however, then Czechoslovakia should not have begun the alternative plan before the ICJ ruled on the case; in 2017, Hungary and Slovakia agreed to discontinue the ICJ proceedings

Slovakia-Poland: none identified

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