US Library of Congress. Country Profile: Bulgaria
- Overview of life, history, and culture of Bulgaria by the US Library of Congress.
- http://lcweb2.loc.gov/frd/cs/profiles/Bulgaria.pdf

Bulgaria: National Statistical Institute
- Official government site offers information about the law on statistics, and information about the population, ecology, and economy of the country.
- http://www.nsi.bg/

Republic of Bulgaria
- Official government site tells about the government and the country in general. Includes the history of the country, some basic statistics, national symbols, public holidays, and a map of the districts as well as speeches by the prime minister and other g
- http://www.government.bg