According to research by Dan Tilque in a study published in 2001, the most popular city names are Riverside (found in 46 states) and Centerville (found in 45 states). However, there are no city names appearing in all 50 states.
The only states that do not have a city named Riverside are Hawaii, Alaska, Louisiana and Oklahoma.
Some other common city names include Fairview (in 43 states), Franklin (in 42 states) and Midway (in 40 states). Other frequently used names include Fairfield (in 39 states), Pleasant Valley (in 39 states), Troy (in 39 states), Liberty (in 38 states) and Union (in 38 states). Salem appears in 36 states.
Surprisingly, Tilque found that Springfield, commonly assumed to be one of the most common city names, did not even make the top 10 list. Springfield appears only in 32 places, five of which are in Wisconsin.
Dan Tilque works as a recreational linguist. His information comes from the U.S. Geologic Survey's Geographic Names Information Service and was originally published in Word Ways, a publication dedicated to recreational linguistics. Word Ways releases a publication four times a year, in February, May, August and November, and made its first publication in 1968. As of 2015, Jeremiah Farrell serves as Word Way's editor.