Largest cities
Jakarta 10,685,000 pop., 35,386,000 urban aggl.
Surabaya 2,874,000 pop., 6,556,000 urban aggl.
Bandung 2,444,000 pop., 7,203,000 urban aggl.
Medan 2,435,000 pop., 4,027,000 urban aggl.
Palembang 1,669,000 pop., 2,069,000 urban aggl.
Semarang 1,654,000 pop., 2,319,000 urban aggl.
Makassar 1,424,000 pop., 1,936,000 urban aggl.
Tangerang Selatan 1,354,000 pop.
Batam 1,196,000 pop., 1,403,000 urban aggl.
Bandar Lampung 1,166,000 pop.
Highest mountains
Puncak Jaya 4,884 m (16,024 ft)
Sumantri 4,870 m (15,978 ft)
Longest rivers
Kapuas 1,143 km (710 mi)
Batang Hari 800 km (497 mi)
Mamberamo 800 km (497 mi)
Largest lakes
Lake Toba 1,130 kmē (436 sq mi)
Lake Towuti 561 kmē (217 sq mi)
Lake Jempang 450 kmē (174 sq mi), medium surface area
Largest islands
New Guinea 785,753 kmē (303,381 sq mi) total, 413,253 kmē (159,558 sq mi) in Indonesia
Borneo 743,330 kmē (287,001 sq mi) total, 533,250 kmē (205,889 sq mi) in Indonesia
Sumatra 420,306 kmē (162,281 sq mi)
Celebes / Sulawesi 174,600 kmē (67,413 sq mi)
Java 129,439 kmē (49,977 sq mi)
Timor 30,377 kmē (11,729 sq mi) total, 15,521 kmē (5,993 sq mi) in Indonesia
Halmahera 17,780 kmē (6,865 sq mi)
Seram 17,100 kmē (6,602 sq mi)
Sumbawa 14,386 kmē (5,554 sq mi)
Flores 14,268 kmē (5,509 sq mi)
Yos Sudarso 11,742 kmē (4,534 sq mi)
Bangka 11,413 kmē (4,407 sq mi)
Sumba 10,997 kmē (4,246 sq mi)