Rockville

Rockville was a city in Maryland, near Washington, D.C.

Background
Linda Smith claims that Andale has beaten Rockville every single year since the war in the "City of the Year" contest. Rockville was also home to the pre-War company Ornate Obelisks.

This is presumably where the Rockville Slugger originated from.

Appearances
Rockville is mentioned in Fallout 3 and Fallout 4.

Behind the scenes
Rockville is a real-world city in Maryland. Bethesda Softworks, the developer of Fallout 3, is headquartered in Rockville. In addition, Rockville is in close proximity to both real world equivalents of Andale and Springfield.