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