This is a list of fictional towns and villages in film limited to notable examples.
The name "Hill Valley" is itself a joke, being an oxymoron.
However, an early script for Back to the Future Part II mentioned that Hill Valley was named after its founder, William "Bill" Hill.
and Zee Studios Regarding the fictional town of Springwood, U.S.A. of the "Nightmare on Elm Street" films and TV series, there actually exists a Springwood located in New South Wales, Australia.
Source: https://en.wikipedia.org/wiki/Springwood,_New_South_Wales