New California is a region defined by the New California Republic that comprises northern Nevada and all of California.
Former Southern CaliforniaEdit
Also known as the Core Region, what was once southern California is a stark image of the effects of atomic warfare.
The city of San Diego was hit during the war, with its inhabitants eventually leading an exodus to the ruins of Los Angeles, also known as the Boneyard. The Boneyard is a vast stretch of ruined buildings, baking under the sun. In between is the Glow, the ruins of West Tek Research Base. The Hub, Junktown, and Shady Sands are further up north.
The former state of Nevada is described as an empty no man's land in 2161, at least when compared to the Southern California Wasteland. Few are able to traverse the rough terrain of the Sierra Nevada Mountains alone.
The Mojave Wasteland is a wasteland that comprises southern Nevada and parts of California and Arizona. The Mojave Wasteland is having power struggles between the NCR invaders, Caesar's Legion tribals, and Mr. House. Hoover Dam and the New Vegas Strip are the main interests and concerns. Drug running, gang life, and rampaging tribals are not rare in the area, as well as runaway creatures and hostile wildlife.
- New California, formerly Southern California (Fallout, Fallout 2, Fallout: New Vegas)
- Anaheim (Mentioned in Fallout 2)
- Anza-Borrego (Mentioned in Fallout: New Vegas)
- Barstow (Fallout Official Survival Guide)
- Boneyard (Fallout)
- Dayglow (Mentioned in Fallout, Fallout 2 and Fallout: New Vegas)
- Death Valley (Mentioned in Fallout Manual)
- Divide (Lonesome Road) 
- The Hub (Fallout)
- Irvine (Mentioned in Fallout: New Vegas)
- Junktown (Fallout)
- Lake Isabella (Mentioned in Fallout: New Vegas)
- Monterey (Mentioned in Fallout 4)
- Necropolis (Fallout)
- Vault 12 (Fallout)
- Oak Creek (Mentioned in Fallout: New Vegas)
- One Pine (Mentioned in Fallout: New Vegas)
- Owens Lake (Mentioned in Fallout: New Vegas)
- Owens River (Mentioned in Fallout: New Vegas)
- Scrapheap (Fallout Demo)
- San Onofre (Mentioned in Fallout: New Vegas)
- Shady Sands (Fallout, Fallout 2)
- Stockton (Mentioned in Fallout 2) 
- Vault 13 (Fallout, Fallout 2)
- West Tek Research Facility (Fallout)
- Former Nevada (Fallout, Fallout 2, Mentioned in Fallout: New Vegas)
- Mojave Wasteland (Fallout: New Vegas)
- Area 2 (Fallout: New Vegas)
- Big MT (Fallout: New Vegas)
- Boulder City (Fallout: New Vegas)
- Camp Searchlight (Fallout: New Vegas)
- Cottonwood Cove (Fallout: New Vegas)
- Freeside (Fallout: New Vegas)
- Goodsprings (Fallout: New Vegas)
- Henderson (Fallout: New Vegas)
- Hoover Dam (Fallout: New Vegas, Van Buren)
- Jacobstown (Fallout: New Vegas)
- Nellis Air Force Base (Fallout: New Vegas)
- New Vegas (Mentioned in Fallout, Fallout: New Vegas)
- Nipton (Fallout: New Vegas)
- Novac (Fallout: New Vegas)
- Primm (Fallout: New Vegas)
- Red Rock Canyon (Fallout: New Vegas)
The Southwest Commonwealth appears in Fallout, Fallout 2, and Fallout: New Vegas, Lonesome Road, and is mentioned in all of its add-ons, as well as Fallout 3 and the Fallout Bible. It was to appear in Van Buren and Jason Mical's Fallout Pen and Paper d20. The Mojave Desert is also mentioned in Fallout 4, and the pre-War iteration of the Fabulous New Vegas sign appears in the Atomic Command Pip-Boy game.
- ↑ Plaque on the Massachusetts state house in Fallout 4 gives 1969 as the formation date of the "Thirteen commonwealths"
- ↑ Fallout endings:
See Super mutants / See Ending 1
- ↑ Dialogue with Joshua Graham indicates a California location: "Something bad happened near Death Valley, at a place called the Divide. NCR couldn't cut across anymore and it slowed down their reinforcements. Terrible storms ripped entire companies apart before they even got to Nevada soil."
- ↑ Nahant Oceanological Society terminal entries
- ↑ Fcryan.msg, Lines 118-119
- ↑ Jack Cabot dialogue: "Maybe I'll finally travel to the Southwest. My father was always convinced that there was another alien city buried somewhere in the Mojave Desert."