World Flag Database - Over 260 pages on countries and international organizations and their flags. Each page contains basic information on the country. The flags include the national and state flags, ensigns, and sub-national flags. Where countries have changed their flags in the last few years the old flag is also shown.

Flags of the World - Historical flags, flags of political sub-divisions, as well as some very well-known present-day flags are presented in this site.

Guide to American Flags - University of Oklahoma-Law Center site with information on state, United States, and territorial flags.

Flag of the United States of America - Dedicated to the complete history and symbolism of the United States Flag.