USA spaceports
Private commercial
Spaceport America New Mexico
SpaceX - Boca Chica Beach, Texas.
Blue Origin - West Texas Launch Site
Quasi Private
Alaska Aerospace Corporation (Launch site only company) on Kodiak Island, Alaska
Wallops Flight Facility(NASA) - Wallops Island spaceport(Orbital ATK)
National (Goverment)
NASA Florida - Kennedy Space Center (KSC)
California - Edwards Air Base
Vandenberg Air Force Base - California, Just North of LA.
Not fully functional
San Nicolas Island, just of the coast from Los angeles is a U.S. Navy facility used for missile testing, being considered by DARPA for a fully functional Space Port.
Omelek Island operational between 2006 and 2009 for SpaceX Falcon 1 (speculatively for BFS testing)