URE Outer-Rim Colonies: 678 worlds
Procyon Prime system
*Commonwealth of Arcadia (parliamentary republic; POP: 3,672,103 million citizens)
*Republic of Minorca (constitutional democracy; POP: 4,509,944 million citizens)
Mu Arae system
*Federal Territory of Ares IV (federal republic; POP: 6,998,072 million citizens)
29 Ursae Minoris system
*Federal Commonwealth of Whitefall (liberal democracy; POP: 2,513,0668 million citizens)
47 Ursae Majoris system
*Commonwealth of Asphodel Meadows (parliamentary, presidential republic; POP: 12,812,743 million citizens)
*Peleus Federation (federal, constitutional, parliamentary republic; POP: 6,128,567 million citizens)
55 Cancri system
*State of Musashi (federal democracy and constitutional monarchy; POP: 40,622,078 million citizens)
Phoros system
*Federal Territory of Phoros IV (constitutional democracy; POP: 1,330,549 million citizens)
Persia system
*Republic of New Iran (federal, parliamentary, presidential republic; POP: 71,332,468 million citizens)
*Republic of the Persian Moons (parliamentary, constitutional democracy; POP: 54,892,306 million citizens) [3 lunar colonies {Persia IV, Persia V, Persia IX}]
5 Andromedae system
*Federal Territory of Ulster (parliamentary republic; POP: 359,462 thousand citizens)
Yosemite system
*Federal Republic of Yosemite VII (federal republic; POP: 56,122,938 million citizens)
*Federal Territory of Rose (federal democracy; POP: 3,517 thousand citizens)
Sokovia system
*United Republic of the Sokovia System (federal, parliamentary, semi-presidential republic; POP: 91,317,559 million citizens)
142 Draconis system
*Federal Territory of Vodin (constitutional republic; POP: 1,556,912 million citizens)
*Federal Territory of Pelion (presidential republic; POP: 821,064 thousand citizens)
Tylos system
*State of Tylos IV (parliamentary democracy; POP: 9,772,316 million citizens)
26 Draconis system
*Republic of Levosia (parliamentary republic; POP: 24,906,558 million citizens)
Indus 57 system
*Republic of New Saidabad (constitutional republic; POP: 1,356,987 million citizens)
Lambda Serpentis system
*Republic of Jericho VII (federal, presidential republic; POP: 3,678,108 million citizens)
Eden system
*Commonwealth of Eden IV (presidential, constitutional federation; POP: 20,473,856 million citizens)
Charybdis system
*Charybdi Republic (parliamentary republic; POP: 6,983,027 million citizens)
Eridani 93 system
*Republic of Ceres (federal, presidential, parliamentary republic; POP: 169,048,973 million citizens)
Indus 78 system
*Federal Territory of Gress (parliamentary democracy; POP: 3,097,815 million citizens)
Iota Eridanus system
*Republic of Eridanus II (federal, presidential republic; POP: 7,523,976 million citizens)
**Autonomous Republic of Ehield (POP: 2,776,532 million citizens)
**Autonomous Republic of Eridanus Secundus (POP: 1,548,966 million citizens)
Eta Lupus system
*Commonwealth of Kholo (parliamentary republic; POP: 1,652,818 million citizens)
Zeta Khan 43 system
*Federal Territory of New Albstadt (federal, parliamentary, constitutional republic; POP: 3,611,749 million citizens)
Epsilon Astraeus system
*Federal Territory of New Frazão (constitutional, liberal democracy; POP: 7,313,098 million citizens)
Upsilon Eridanus system
*Republic of Titus (constitutional republic; POP: 18,914,042 million citizens)
Desdoron system
*Republic of Desdoron V (parliamentary republic; POP: 6,128,902 million citizens)
Delta Astraeus system
*Republic of Cote d'Azure (constitutional republic; POP: 5,829,101 million citizens)
Hurst system
*Federal Republic of Schönheit (federal, parliamentary, constitutional republic; POP: 4,658,233 million citizens)
Omega Khan 78 system
*Federal Territory of Brennus (constitutional republic; POP: 1,766,053 million citizens)
Vegas system
*Republic of New Liberty (constitutional, representative democracy; POP: 20,546,108 million citizens)
Elduros system
*Federal Territory of Aleria (semi-presidential republic; POP: 517,094 thousand citizens)
Eta Eridanus system
*Commonwealth of Arundel (parliamentary, liberal democracy; POP: 5,911,062 million citizens)
*Federal Territory of Asimov (federal republic; POP: 906,448 thousand citizens)
Orrichon system
*Republic of Sedra (federal republic; POP: 1,877,342 million citizens)
68 Arcturus system
*Federal Territory of Cleyell (constitutional democracy; POP: 4,913,077 million citizens)
Zeta Arcturus system
*Commonwealth of Bellerophon (parliamentary republic; POP: 7,099,654 million citizens)
Mallas system
*Republic of Verent (parliamentary republic; POP: 37,903,513 million citizens)
67 Arcturus system
*Republic of Dwarka (federal republic; POP: 6,233,988 million citizens)
Cygnus Prime system
*Dominion of Cygnus II (representative democracy, and constitutional monarchy; POP: 2,766,099 million citizens)
*Federal State of New Jerusalem (federal republic; POP: 3,876,209 million citizens)
12 Eridani system
*Republic of New Baltimore (representative democracy; POP: 1,175,375,394 billion citizens)
Omega Lupus system
*Republic of Asmara (federal republic; POP: 3,667,543 million citizens)
83 Lupus system
*Federal Territory of Opportunity (federal republic; POP: 992,568 thousand citizens)
*Federal Territory of Keystone (constitutional republic; POP: 2,544 thousand citizens)
*Federal Territory of New Warsheikh (parliamentary republic; POP: 2,788,236 million citizens)
*Federal Territory of Tuscia (presidential confederation; POP: 612,845 thousand citizens)
Alpha Augirae system
*Federal Republic of Capella (constitutional republic; POP: 3,761,053 million citizens)
Eridani 78 system
*United Kingdom of Asphodel (parliamentary democracy and constitutional monarchy; POP: 2,544,761 million citizens)
Escala system
*Federal Territory of Escala III (parliamentary republic; POP: 4,783,109 million citizens)
81 Eridani system
*Federal Territory of Altyndepe (constitutional democracy; POP: 1,356,084 million citizens)
Groombridge 12 system
*Federal Territory of Jurassus (liberal democracy; POP: 5,813 thousand citizens)
*Federal Territory of Balance (parliamentary republic; POP: 478,925 thousand citizens)
Groombridge 1830 system
*Federal Territory of Groombridge-1830A (parliamentary republic; POP: 987,432 thousand citizens)
Lambda Aurigae system
*Federal Territory of Roost (parliamentary republic; POP: 1,989,767 million citizens)
Upsilon Eridanus system
*Federal Territory of Ridgeway's Folly (constitutional, parliamentary republic; POP: 1,765,800 million citizens)
Circinius system
*Federal Territory of Circinius IV (federal republic; POP: 2,877,314 million citizens)
Eridani 55 system
*Federal Territory of Green Hills (federal republic; POP: 1,876,432 million citizens)
Epsilon Astraeus system
*Republic of Nephthys (constitutional republic: POP: 1,987,233 million citizens)
Lambda Eridanus system
*Federation of Hat Yai (federal, representative republic; POP: 1,543,809 million citizens)
Zeta Aurigae system
*Commonwealth of Sansar (unitary, parliamentary republic; POP: 4,865,203 million citizens)
Lambda Tychonis system
*Republic of New Prussia (presidential republic; POP: 6,290,155 million citizens)
81 Aurigae system
*Dominion of Nordarus (parliamentary democracy and constitutional monarchy; POP: 1,126,607,349 billion citizens)
Gamma Indi system
*Federal Territory of Second Base (parliamentary republic; POP: 1,876,000 million citizens)
Neutron Secunda system
*Republic of Eden (parliamentary republic; POP: 1,989,432 million citizens)
DX Cancri system
*United Commonwealth of Roleath (constitutional monarchy and representative democracy; POP: 350,882,109 million citizens)
Dremire system
*Republic of the Dremire System (presidential democracy; POP: 69,207,554 million citizens) [5 planetary (major) colonies/2 planetary (minor) colonies/11 lunar colonies/23 colony platforms]
Eridani 31 system
*Commonwealth of Lyslander (constitutional democracy; 8,119,363 million citizens)
Indus 23 system
*Dominion of Terceira (parliamentary democracy, and constitutional monarchy; POP: 3,825,098 million citizens)
Eridani 71 system
*Commonwealth of Green Fields (parliamentary republic; POP: 1,773,048 million citizens)
Delta Astraeus system
*Federal Republic of Biko (federal, parliamentary republic; POP: 8,433,987 million citizens)
Oxius system
*Federal Territory of Oxius V (constitutional republic; POP: 956,672 thousand citizens)
Neu Deutschland system
*Federal Republic of Manheim (federal, parliamentary, constitutional republic; POP: 27,580,973 million citizens)
Pavoni 276 system
*Republic of Lacerta (parliamentary confederation; POP: 2,443,914 million citizens)
58 Secundus system
*Federal Territory of Krasnoye Nebo (parliamentary, presidential republic; POP: 1,987,456 million citizens)
Pavoni 13 system
*Federal Territory of Querencia (federal republic; POP: 1,937,248 million citizens)
Pavoni 148 system
*Confederation of Shambhala (parliamentary, presidential confederation; POP: 42,119,863 million citizens)
NA-32 system
*Republic of Shanxi (constitutional republic; POP: 2,711,344 million citizens)
*Commonwealth of London II (federal democracy and constitutional monarchy; POP: 6,319,098 million citizens)
Astraeus 64 system
*Federal Commonwealth of Bliss (parliamentary republic; POP: 515,695,497 million citizens)
Eridani 73 system
*Tyrrhus Commonwealth (presidential confederation; POP: 4,513,912 million citizens)
*Republic of Casimir (constitutional republic; POP: 1,422,368 million citizens)
Rockwood 12 system
*Commonwealth of Boundary (parliamentary republic; POP: 8,546,156 million citizens)
*Westerplatte Federation (presidential democracy; POP: 13,658,042 million citizens)
Sigma Arcturus system
*Federal Republic of Aldonia (federal, parliamentary republic; POP: 9,887,109 million citizens)
*Zerrike Commonwealth (presidential confederation; POP: 3,103,615 million citizens)
Scylla system
*Commonwealth of Scylla III (liberal democracy; POP: 480,562,017 million citizens)
Zeta Leporis system
*Federal Territory of Durisdeer (liberal democracy; POP: 275,034 thousand citizens)
Nireus system
*Commonwealth of Nireus II (parliamentary republic; POP: 2,765,098 million citizens)
Lupus 05 system
*Federal Territory of Ariel (constitutional republic; POP: 500,789 thousand citizens)
Luyten 726-8 system
*Federal Territory of Luyten (federal, representative republic; POP: 2,987,056 million citizens)
Luyten 104-5 system
*Republic of Capricornia (presidential, representative republic; POP: 5,987,306 million citizens)
*Commonwealth of Miranda (parliamentary republic; POP: 9,672,848 million citizens)
57 Geirrod system
*Federal Territory of Orchid IV (parliamentary republic; POP: 478,903 thousand citizens)
Eridani 892 system
*Federal Territory of Capes (constitutional republic; POP: 450,987 thousand citizens)
*Federal Territory of Aegis (liberal democracy; POP: 981,344 thousand citizens)
157 Spectris system
*Federal Territory of Penglai (representative democracy; POP: 1,359,072 million citizens)
Coros system
*Federal Territory of Anvil (presidential confederation; POP: 7,122,958 million citizens)
Nihal system
*Lyubov Commonwealth (parliamentary republic; POP: 1,566,098 million citizens)
*Republic of Makino (federal republic; POP: 3,408,998 million citizens)
*Commonwealth of Matsuda (presidential republic; POP: 5,174,682 million citizens)
*Republic of Kanroku (constitutional republic; POP: 3,988,123 thousand citizens)
*Republic of Abkhazia (presidential confederation; POP: 4,781,062 million citizens)
118 Scorpii system
*Federal Territory of Sequoia (liberal democracy; POP: 21,661,078 million citizens)
Vione system
*Federal Territory of Hercynia (constitutional republic; POP: 788,106 thousand citizens)
*Federal Territory of Conduses (parliamentary republic; POP: 344,906 thousand citizens)
*Commonwealth of Odessa (semi-presidential republic; POP: 3,441,098 million citizens)
*Republic of Xenia (liberal, presidential democracy; POP: 2,763,178 million citizens)
*Federal Territory of Segovia (federal republic; POP: 459,982 thousand citizens)
56 Spectris system
*Commonwealth of Bassania (liberal democracy; POP: 5,829,043 million citizens)
Zeus system
*Republic of Barkhatova (parliamentary republic; POP: 3,716,091 million citizens)
*Federal Territory of Ishimura (federal republic; POP: 45,616 thousand citizens)
*Federal Territory of Verne (constitutional republic; POP: 1,582,809 million citizens)
*Federal Territory of Ward (liberal democracy; POP: 3,422,098 million citizens)
Teletha system
*Federal Territory of Teletha VI (liberal democracy; POP: 5,063,811 million citizens)
Zenith system
*Federal Republic of Aster (federal, presidential republic; POP: 3,642,995 million citizens)
Mozdok system
*Federal Territory of Savos (parliamentary democracy; POP: 6,355,014 million citizens)
Epsilon Indi system
*Parliamentary Republic of Harvest (parliamentary republic; 3,456,098 million citizens)
AN: Charybdi is the denonym for the citizens of the Charybdis Moons, and just so you know the capital cities of Shanxi and London II is New Taiyuan and New London respectively; the capital city of Shambhala is Kapala. I think that the Outer Colonies that survived the war by isolating themselves from the rest of Earth and Her Colonies, leaving some to become independent, while others fell under authoritarian and totalitarian regimes led by either their corrupt planetary governors or the corporations that are based there.
Now I got a theory related to the planet of Bliss, one of the more peaceful Outer Colonies, it was feared that after a brief battle with the Covenant over the garden world, that it's population of over 500 million people were dead. But the official human casualty count by 2530 was at least over 60 million, so the initial assumption being wrong, means that there are more survivors. Maybe there was remote scanning outpost there and it gave an advanced warning to the Bliss Defense Fleet, which could have additional naval assets sent there with the onset of Contact: Harvest, giving that Bliss is a major colony. Any additional vessels could've sent dropships and the civilian ships present were repurposed as evacuation vessels, so that must've sped up the evacuation. Which would mean that defeat of the UNSC Weeping Willows, the UNSC Matador, and the UNSC Purpose forced them to abandon those still on the planet in order to make sure that majority of the refugees got away safely and it would've been weeks to months before they reached a safe haven. There is no way that the media could've known that there were survivors.
Here's a quote to go with it: "Breaking news! Just hours ago, hundreds of ships, some of them military and the rest civilian with varying amounts of damage per ship, have arrived in the Beta Taurius and Alpha Centauri systems, requesting clearance to land at the system's spaceports, the planetary governments have granted this request. Wait, this just in from New York! UEG and UNSC officials have announced that their port of registry is Bliss. They are grateful that it is confirmed that there are survivors from what was once a utopia." I am a little pissed that Bliss is now a mine, no really pissed. I thought the UEG would've made re-terraforming Bliss a priority, apparently the BXR mining giant has a lot of influence in the UEG too.