• Information Please   
  
  Almanac, encyclopedia, and dictionary all in one. Wide variety of information on almost every subject.
  http://www.infoplease.com/
• Old Farmer's Almanac   
  
  First published in 1792, this is the grand daddy almanac of them all.
  http://www.almanac.com/

• 50 States.com
  
  Information and data collected on the fifty United States. Find out a State motto or official bird. Find a state capital or a state's GPS cordinates.
  http://www.50states.com/
• Afro-American Almanac
  
  A historical perspective of a nation, its people, and its cultural evolution. From the beginning of the slave trade through the Civil Rights movement, to the present. Information that will give you a better understanding of the problems we face today as a Nation.
  http://www.toptags.com/aama/
• American Fact Finder
  
  Find out the population, housing, economic, and geographic data for your City or State here. Also has data on residents median age, education, income, race, and more. From the U.S. Census Bureau.
  http://factfinder.census.gov/home/saff/main.html
• CIA World Factbook
  
  Information on the countries of the world. Includes country population, size, resources and more. From the Central Intelligence Agency (CIA).
  http://www.odci.gov/cia/publications/factbook/
• Daily Almanac
  
  A list of special things that happen on today's date. From the University of Chicago.
  http://www.copi.org/craig/events/today.html
• Deb and Jen's Land O' Useless Facts
  
  Bringing you useless facts and information since 1995. From, Deb and Jen of course.
  http://www.uselessfacts.info/
• Defense Almanac
  
  Learn all about the present U.S. military build-up. How much money is ear marked for defense? How many submarines do we have? Plus many other U.S. defense categories and information. From the U.S. Department of Defense.
  http://www.defenselink.mil/pubs/almanac/
• Envirofacts Data Warehouse
  
  Environmental facts and information. From the Environmental Protection Agency (EPA).
  http://www.epa.gov/enviro/
• Fun Trivia  [ formerly The Archive of Useless Facts and Trivia ]
  
  Hundreds of categories of useless facts, fun facts, and trivia on almost every subject. Luckily, this site is searchable.
  http://www.funtrivia.com/
• Guinness Book of World Records
  
  Find a world reord for just about everything here.
  http://www.guinnessworldrecords.com/
• Science Based Facts on Drug Abuse and Addiction
  
  From cigarettes to drugs like cocaine, discover the facts about chemical dependency. Find out the health effects of taking certain drugs like Ecstasy, LSD, Heroine, and more. From the National Institute on Drug Abuse.
  http://www.nida.nih.gov/infofax/
• Sun and Moon Data for One Day
  
  Obtain the times of sunrise, sunset, moonrise, moonset, transits of the Sun and Moon, and the beginning and end of civil twilight, along with information on the Moon's phase by specifying the date and location.
  http://riemann.usno.navy.mil/aa/data/docs/RS_OneDay.html
• Totally Useless Legal Facts
  
  Totally useless legal facts that are fun to read and browse through.
  http://www.gavel2gavel.com/humor/useless-legal-facts/
• Video Almanac
  
  Relive the news as it happened back then. Cheer for the rescue of baby Jessica or jiggle along with reporter Anne McDermott as she gets caught in an aftershock from the earthquakes that rocked California in 1992. From CNN.com.
  http://www.cnn.com/resources/video.almanac/
• World Population
  
  Want to know what the population of the world is? Find out here by viewing the World Population Clock. From the U.S. Census Bureau.
  http://www.census.gov/ipc/www/world.html

     See also, these cross-references:

• Encyclopedias
  
• Statistics and Data
  
• Today in History