American Sign Museum
http://www.signmuseum.org
Documents a historical collection of signs in their many types and forms - located in Cincinnati, Ohio, USA

Neon Museum
http://www.neonmuseum.org
Has an aim to collect, preserve, study and exhibit neon signs and associated artifacts - based in Las Vegas, USA

Museum of Neon Art
http://www.neonmona.org/
exhibits, documents and preserves contemporary fine art in electric media and outstanding examples of neon signs located in City Walk in Universal City, California.

Jimmy Neon Museum
http://www.neonmuseum.com
Works of neon by artist Jim Moriis - includes vehicles, business graphics, nudes, Neon Art as Signage, Kinetic Neon, etc.