Dayglow

 Dayglow, originally known as San Diego in the Wasteland before 2162, is located on the remains of San Diego, near the site of the Glow. It is both a city and one of five New California Republic states. 

Background
The town is north and west of the Glow, which can be seen from its borders. Before 2161, the town was populated by individuals that founded the Followers of the Apocalypse, including Nicole, the founder of the Followers and her parents. Butch Harris also lived here for a time before moving to the Boneyard, and later the Hub.

After the exodus, due to the spread of sickness, the town was completely abandoned. After 2162, a number of ghouls settled in the abandoned area, as part of the Great Migration from the destroyed Necropolis. Once the ghouls learned of West Tek, they set up a scavenging company excavating the facility and formed partnerships with scavenging companies from New Adytum and the Hub. At least one super mutant, a refugee from the Cathedral, was also rumored to be working with the ghouls and humans in Dayglow.

Rising to prominence over the next thirty years, Dayglow became one of the five founding states of the New California Republic in 2189 alongside the states of Shady, Los Angeles, the Hub, and Maxson. The Dayglow Incorporation Address by NCR President Tandi is represented on the NCR $100 bill.

In 2281 NCR Rangers passed through Dayglow on their way from Baja to the Mojave.

Inhabitants

 * Butch Harris (before 2161)
 * Nicole (before 2161)

Appearances
Dayglow does not appear in any of the Fallout games, but is mentioned in Fallout (only as "near the Glow"), Fallout 2, Fallout: New Vegas, its add-on Honest Hearts, the Fallout Bible, and The Armageddon Rag, Vol. 4.

Behind the scenes

 * Dayglow is based on the real world location of San Diego, California. Dayglow is likely a play on Daygo, a slang term for San Diego.
 * Its old name is revealed in the Fallout Official Survival Guide.