Indonesia-Australia: all borders have been agreed upon bilaterally, but a 1997 treaty that would settle the last of their maritime and EEZ boundary has yet to be ratified by Indonesia's legislature; Indonesian groups challenge Australia's claim to Ashmore Reef; Australia has closed parts of the Ashmore and Cartier Reserve to Indonesian traditional fishing and placed restrictions on certain catches

Indonesia-Malaysia: territorial disputes resulting from competing interpretations of colonial era documents have prevented a full demarcation of the land border where there are several areas under dispute; negotiations continue; the two countries have not agreed to any EEZ boundaries; disputed maritime areas includes the Ambalat block in the Celebes Sea

Indonesia-Palau: discussions on reaching an agreement on a partial EEZ boundary line continue 

Indonesia-Papua New Guinea:  Papua New Guinea ratified an agreement governing the border in 2023; migrants and separatists crossing the porous 760-kilometer (472-mile) border have complicated diplomatic relations

Indonesia-Philippines:  have ratified EEZ boundary agreements that were initially signed in 2014

Indonesia-Singapore: continue to work on finalizing their 1973 maritime boundary agreement by defining unresolved areas north of Indonesia's Batam Island

Indonesia-Timor Leste: as of 2023, negotiations were ongoing on remaining two segments of the land border under dispute (Bidjael Sunan-Oben and Noel Besi-Citrana) and the maritime borders from Batugade to Atauro and from Atauro to Jaco 

Indonesia-Vietnam: agreed on a continental shelf boundary agreement with Vietnam in 2003 which produced a border around 250 nautical miles long, but the two countries continue to negotiate an agreement regarding EEZ delimitations in the South China Sea

Costa Rica and Nicaragua regularly file border dispute cases over the delimitations of the San Juan River and the northern tip of Calero Island to the International Court of Justice (ICJ); in 2009, the ICJ ruled that Costa Rican vessels carrying out police activities could not use the river, but official Costa Rican vessels providing essential services to riverside inhabitants and Costa Rican tourists could travel freely on the river; in 2011, the ICJ provisionally ruled that both countries must remove personnel from the disputed area; in 2013, the ICJ rejected Nicaragua's 2012 suit to halt Costa Rica's construction of a highway paralleling the river on the grounds of irreparable environmental damage; in 2013, the ICJ, regarding the disputed territory, ordered that Nicaragua should refrain from dredging or canal construction and refill and repair damage caused by trenches connecting the river to the Caribbean and upheld its 2010 ruling that Nicaragua must remove all personnel; in early 2014, Costa Rica brought Nicaragua to the ICJ over offshore oil concessions in the disputed region

Suriname-Brazil: none identified

Suriname-France (French Guiana): in March 2021, Suriname and France signed an agreement to establish their border along the Maroni River and its tributary the Lawa River and to cooperate in combatting illegal gold mining; however, the area further south between the Litani and Marouini Rivers is still disputed, with Suriname claiming the border is along the Marouini to the east and France arguing it is along the Litani River to the west

Suriname-Guyana: the two countries dispute the territory between two rivers, known as the New River Triangle, with Suriname contending that the New River (also called the Upper Corentyne) to the west marks their common border, while Guyana asserts that the Kutari River to the east forms the border; each side claims that their river is the source of the Corentyne River that forms a border further north between the two countries; the Permanent Court of Arbitration settled the maritime boundary between Suriname and Guyana in 2007 in an area with potentially substantial oil reserves