There are many websites devoted to lighthouses and their history both in the United States and around the world. In addition, a number of regional organizations provide extensive information about lighthouses located in specific parts of the country.
The Lighthouse Directory - Provides news, information and links for more than 18,200 of the world’s lighthouses.
Lighthouse Friends - Includes photographs, directions, histories, and GPS coordinates for every lighthouse in the U.S. and many in Canada.
U.S. Coast Guard Historic Lighthouse Index -Contains extensive information on lighthouses, lightships, tenders and other aids to navigation subjects. The site contains a complete listing of lighthouses by state along with historical information about each and photographs.
U.S. Lighthouses - A good source for information about most U.S. Lighthouses and driving directions to see them
United States Lighthouse Society - Provides extensive historical and technical information about American light stations, in addition to offering lighthouse tours throughout the United States and the world.