T
- Trinidad and Tobago
- Tripoli
- Triskelion
- Triton
- Tritonis
- Troy (Mandarin City)
- Troy Geostationary Orbital Platform
- Tsomnaia
- Tuksnesis
- Tumbla
- Tumbla V
- Tun
- Tunisia
- Turkey
- Turkmenistan
- Tuvalu
- Twenx
- Twilight Town
- Tynanda
- Tyvorn Cluster
U
- U-235
- UA High
- Uganda
- Ujanka
- Ukraine
- Ul
- Umbazi
- Undertown
- Union of Soviet Socialist Republics
- United Arab Emirates
- United Kingdom
- United Simians of America
- United Sisterhood Republic
- United States
- United States of America
- Universe 7
- Upperworld
- Uranus
- Uranus
- Urrika
- Urrulu
- Uruguay
- USS Argus
- Utah
- Utapau
- Uzbekistan
V
- Va
- Vaes Dothrak
- Valhalla
- Valinor
- Valusia
- Van Buren Bridge
- Vandor
- Vanishing Point
- Vanuatu
- Vatican City
- Vega
- Venezuela
- Venom
- Venturas
- Venus
- Verdun
- Vermont
- Vestroia
- Victor von Doom (Earth-TRN157)
- Vienna
- Vietnam
- Viltrum
- Virginia
- Viscardi (Planet)
- Vlatava
- Vogsphere
- Volantis
- Volcan Domuyo
- Vormir
- Vormir
- Vorozheika
- Vrellnex
- Vulliger
- Vvex
W
- Wakanda
- Wakandan Embassy
- Wakefield
- Wallach IX
- Walter Reed Army Medical Center
- War Room X
- Warp
- Warworld
- Washington
- Washington, D.C.
- Watchtower
- Wayne Manor
- Wayne Tower
- Weapon Plus Orbital Station
- Weirdworld
- Well Of Mimir
- Wellspring Of Life
- West Orange Pavillion Mall
- West Point
- West Virginia
- Westchester County
- Western African Republic
- Westeros
- Whaan Prime
- White Hot Room
- Whoville
- Wilamean
- Winterfell
- Winterslag
- Wisconsin
- Wobani
- Wobb-Lar
- Wonder Land
- Works
- World Forge
- Worldship (Taa II)
- Wraithworld
- Wumpa Island
- Wych Cross
- Wyllys
- Wyoming
X
- Xan City
- Xandar
- Xantar
- Xantar
- Xantares
- Xanth (Planet)
- Xaravaran
- Xavier Institute
- Xaviera
- Xen
- Xix
- Xorr the God-Jewel (Earth-616)
