Ares City, named for the Greek counterpart to Mars, the god of war, is the capital city of the Confederated Martian Colonies (TOS novel: The Captain's Daughter, ENT novel: Beneath the Raptor's Wing)

In 2155, Qaletaqu, the Martian representative to the Coalition of Planets, planned to deliver the news of the Confederacy of Vulcan's refusal to provide direct military support to United Earth and the Confederated Martian Colonies (in favor of a sensor detection network) at the seat of the Governing Council in Ares City. (ENT novel: Beneath the Raptor's Wing)

Nyota Uhura worked in Ares City for a brief time in early 2285. (TOS novel: The Captain's Daughter)

Capital planets and cities
Interstellar states	Paris, Earth (United Federation of Planets) • First City, Qo'noS (Klingon Empire) • Ki Baratan, Romulus (Romulan Star Empire) • Lor'Vela, Andor (Andorian Empire) • Cardassia City, Cardassia (Cardassian Union) • Me'leit, Talar (Talarian Republic) • Rashtag, Janalwa (Holy Order of the Kinshaya) • Ab-Tzenketh (Tzenkethi Coalition) • Ferenginar (Ferengi Alliance) • Keelee-Kee, Tezwa (Tezwa) • Rexlar-D, Dosi (Dosi Confederation) • L'hur (Sikarian Canon) • Dinaal City (Dinaal) • New Founder Homeworld (Dominion) • Unimatrix 01 (Borg Collective) • Achernar Prime (Imperial Romulan State, defunct)
Federation members	San Francisco (United Earth) • ShiKahr (Confederacy of Vulcan) • New Samarkand (Alpha Centauri) • Ares City (Confederated Martian Colonies) • Ashalla (Republic of Bajor) • Leran Manev (Trill) • Stratos (Ardana) • Pike City (Cestus III) • Iaron (Damiano) • New Coridan (People's Republic of Coridan) • Nuvia (Risian Hedony) • Zhelnogra (Tenara) • Laikan (Andorian Empire)
Federation member state subdivisions & colonies	New Burbank (Rigel VI, United Rigel Colonies) • Rigel Trade Complex (Rigel X, United Rigel Colonies) • New Rakantha (New Bajor, Republic of Bajor) • Port Emily (Sherman's Planet) • London (United Kingdom, United Earth) • Washington, DC (United States, United Earth) • Madrid (Spain, United Earth)
Interstellar state subdivisions	Ka'Hat (Sherman's Planet, Klingon Empire) • Kecemen (Karemma Foundation, Dominion)

the planet Mars
cities and settlements	Ares City • Bradbury City • Bradbury Township • Burroughs City • Cochrane • Endurance • Gunderdottir's Dome • New Venice • Nova Ares • Phillipstown
regions and provinces	Amazon Planitia • Martian Colony 3 • Utopia Planitia (Nova Ares • Utopia colony)
geography	Arisia Mons • Olympus Mons • Terra Strenum • Valles Marineris
bodies of water	Copernicus Lake • Lake Mlarcovik
outposts and installations	Fort Kiley • Fort Lincoln • Marsbase/Mars Base • Utopia Planitia Fleet Yards (Utopia Planitia Control • Utopia Station One)