Anime-Cons.com (reference site)
Tokyo Anime Center
See also: tek's links: events

Note: I'll try as best I can to keep information (dates & locations) up to date for at least a month in advance. Info on events listed beyond that may be from the previous year.

January

• Ikkicon (Austin, TX; Jan. 1-3, 2010)
• Anime Los Angeles (Los Angeles, CA; Jan. 6-8, 2012)
• Ohayocon (Columbus, OH; Jan. 27-29, 2012)
• Setsucon (State College, PA; Jan. 28-29, 2012)

• Chibi Ushicon (Round Rock, TX; Feb. 3-5, 2012)
• Ai-Kon (Winnipeg, MB, Canada; Feb. 11, 2012)
• Katsucon (National Harbor, MD; Feb. 17-19, 2012)
• Anime Milwaukee (Milwaukee, WI; Feb. 20, 2012)
• MangaNEXT (East Rutherford, NJ; Feb. 24-26, 2012)

• Senshi-Con (Anchorage, AK; Mar. 20-21, 2010)
• Animarathon (Bowling Green, OH; Mar. 26, 2011)
• Genericon (Troy, NY; March 2-4, 2012)
• AnimeLand Wasabi (Denver, CO; Mar. 9-11, 2012)
• Animania Festival (Brisbane, Australia; Mar. 10, 2012; Sydney, Australia; Mar. 24, 2012)
• Kawa Kon (St. Louis, MO; Mar. 16-18, 2012)
• Kawaii Kon (Honolulu, HI; Mar. 16-18, 2012)
• MomoCon (Atlanta, GA; Mar. 16-18, 2012)
• Tekkoshocon (Pittsburgh, PA; Mar. 21-25, 2012)
• Tokyo International Anime Fair (Tokyo, Japan; Mar. 24-25, 2012)
• Anime Detour (Bloomington, MN; Mar. 30-Apr. 1, 2012)
• Naka-Kon (Kansas City, KA; March 15-17, 2013)

• Castle Point Anime Convention (Hoboken, NJ; Apr. 1, 2012)
• Anime Boston (Boston, MA; Apr. 6-8, 2012)
• Anime Matsuri (The Woodlands, TX; Apr. 6-8, 2012)
• Middle Tennessee Anime Convention (Nashville, TN; Apr. 6-8, 2012)
• Sakura-Con (Seattle, WA; Apr. 6-8, 2012)
• Anime St. Louis (Collinsville, IL; Apr. 20-22, 2012)
• Anime Central (Rosemont, IL; Apr. 27-29, 2012)

• No Brand Con (Eau Claire, WI; May 4-6, 2012)
• Otafest (Calgary, Alberta, Canada; May 18-20, 2012)
• Anime Oasis (Boise, ID; May 24-27, 2012)
• Animazement (Raleigh, NC; May 25-27, 2012)
• Anime North (Toronto, Ontario, Canada; May 25-27, 2012)
• FanimeCon (San Jose, CA; May 25-28, 2012)

• Anime Evolution (Vancouver, BC, Canada; June 12-14, 2009)
• A-Kon (Dallas, TX; June 1-3, 2012)
• ColossalCon (Sandusky, OH; June 7-10, 2012)
• OMG!!con (Paducah, KY; June 8-10, 2012)
• AnimeNEXT (Somerset, NJ; June 8-10, 2012)
• Anime Mid-Atlantic (Chesapeake, VA; June 15-17, 2012)
• METROCON (Tampa, FL; June 15-17, 2012)
• PortConMaine (Portland, ME; June 21-24, 2012)
• The Japanese Animation, Film, and Art Expo (Allendale, MI; June 23-24, 2012)
• Anime Expo (Los Angeles, CA; June 29-July 2, 2012)
• Anime Festival Wichita (Wichita, KA; June 29-July 1, 2012)

• PersaCon (Huntsville, AL; July 15-17, 2011)
• ConnectiCon (Hartford, CT; July 13-15, 2012)
• Ikasucon (Fort Wayne, IN; July 13-15, 2012)
• Tokyo in Tulsa (Tulsa, OK; July 20-22, 2012)
• AnimeIowa (Coralville, IA; July 27-29, 2012)
• Otakon (Baltimore, MD; July 27-29, 2012)

• Matsuricon (Worthington, OH; August 28-30, 2009)
• Anime Festival Orlando (Orlando, FL; Aug. 3-5, 2012)
• Otakuthon (Montreal, Quebec, Canada; Aug. 3-5, 2012)
• Tokonatsu Camping Anime & Manga Festival (Woburn, England; Aug. 3-6, 2012)
• Animethon (Edmonton, AB, Canada; Aug. 10-12, 2012)
• Comiket (Tokyo, Japan; Aug. 10-12, 2012)
• San Japan (San Antonio, TX; Aug. 10-12, 2012)
• Mizu Con (Miami, FL; Aug. 17-19, 2012)
• Ani-Jam (Fresno, CA; Aug. 18-19, 2012)
• AnimeFest (Dallas, TX; Aug. 31-Sep. 3, 2012)
• SacAnime (Sacramento, CA; Aug. 31-Sep. 2, 2012)

• OtakuOmaha (Omaha, NE; Sep. 24, 2011)
• Kumoricon (Vancouver, WA; Sep. 1-3, 2012)
• Kita-Con (Thunder Bay, ON, Canada; Sep. 7-9, 2012)
• MechaCon (New Orleans, LA; Sep. 7-9, 2012)
• Nan Desu Kan (Denver, CO; Sep. 14-16, 2012)
• Animania Festival (Sydney, Australia; September 22-23, 2012)
• Anime Weekend Atlanta (Atlanta, GA; Sep. 28-30, 2012)
• Ochiba~Con (Oshawa, ON, Canada; Sep. 29-30, 2012

• Oni-Con (Houston, TX; 2011)
• Yaoi-Con (San Mateo, CA; 2011)
• Animania Festival (Brisbane, Australia; Oct. 6, 2012)
• New York Anime Festival (New York, NY; Oct. 11-14, 2012)
• RealmsCon (Corpus Christi, TX; Oct. 12-14, 2012)
• Tsubasacon (Huntington, WV; Oct. 12-14, 2012)
• Another Anime Convention (Manchester, NH; Oct. 19-21, 2012)
• Aki Con (Bellevue, WA; Oct. 26-28, 2012)

• Anime NebrasKon (Omaha, NE; Nov. 4-6, 2011)
• SugoiCon (Ft. Mitchell, KY; Nov. 4-6, 2011)
• Anime Vegas (Las Vegas, NV; Nov. 11-13, 2011)
• Pacific Media Expo (Los Angeles, CA; Nov. 11-13, 2011)
• Youmacon (Detroit, MI; Nov. 1-4, 2012)
• Nekocon (Hampton, VA; Nov. 2-4, 2012)
• Anime USA (Washington, D.C.; Nov. 9-11, 2012)
• Bakuretsu Con (Colchester, VT; Nov. 9-11, 2012)
• Izumicon (Midwest City, OK; Nov. 9-11, 2012)
• Chibi-Pa (Deerfield Beach, FL, Nov. 16-18, 2012)

• Anime Punch! (Columbus, OH; Dec. 21-23, 2012)