Fallout: New Vegas Locations

General information
Without the add-ons, there are 187 marked locations in the Mojave Wasteland. For an A-Z list of all locations in Fallout: New Vegas, see here. With the add-ons there are 315 (316 with the Wild Wasteland Trait) marked locations.

Major faction locations
''The following is a list of all major factions with two or more marked locations in the Mojave Wasteland. Unmarked locations are in italic type.''

Boomers

 * Nellis Air Force Base
 * Loyal's house
 * Mess hall & munitions storage
 * Nellis Boomer museum
 * Nellis children's barracks
 * Nellis medical station
 * Nellis men's barracks
 * Nellis schoolhouse
 * Nellis women's barracks
 * Nellis workshop
 * Pearl's barracks
 * Nellis hangars
 * Nellis array

State of Utobitha

 * Black Mountain
 * Prison building
 * Broadcast building
 * Storage building

North Vegas Square

 * The Gray

Wild Wasteland locations

 * Jimmy's well
 * The One

Sierra Madre
Sierra Madre can only be accessed if you have the add-on Dead Money.

Sierra Madre Casino


Zion Canyon
Zion Canyon can only be accessed if you have the add-on Honest Hearts.  

Big MT
Big MT can only be accessed if you have the add-on Old World Blues.  

The Divide
The Divide can only be accessed if you have the add-on Lonesome Road.  