• Anime Milwaukee – Milwaukee, Wisconsin (USA)
• ConDor Con 2008 – San Diego, California (USA) — (Primarily a Science Fiction Convention)
• MarsCon 2008 – Bloomington, Minnesota (USA): Primarily a Science Fiction and Fantasy Convention

• Minami Con – Southampton, England (UK)

March 7 – 8, 2008

• Neo Noh Con – Amherst, New York (USA)

March 7 – 9, 2008

• All-Con – Addison, Texas (USA)
• Animaritime – Moncton, New Brunswick (Canada)
• MegaCon – Orlando, Florida (USA) — (Primarily a Science Fiction Convention)

March 8, 2008

• Hana*con – Jenks, Oklahoma (USA)
• Nishikaze – Lethbridge, Alberta (Canada)

March 8 – 9, 2008

• 32 Convención de Juegos de Mesa y Comic’s – Monterrey, Mexico (Site language is Spanish)
• Anime Island Convention – Sandy Bay, Tasmania (Australia)
• Paris Manga – Paris, France (Site language is French)
• S.A.V.E. Konvention – Stephenville, Texas (USA) — (Primarily a Gaming Convention)

March 13 – 16, 2008

• Anime Oasis – Boise, Idaho (USA)
• Comics in Leipzig – Leipzig, Germany — (Primarily a Comics Convention)

March 14 – 16, 2008

• Anime Wasabi – Denver, Colorado (USA)
• FITcon – Melbourne, Florida (USA)
• Wizard World Los Angeles – Los Angeles, California (USA) — (Primarily a Comics Convention)

March 15, 2008

• Cosplay Day Out 2008 – Humble, Texas (USA) — (Includes a cosplay photo shoot and contest)
• Taiwan Comic – Tapei, Taiwan (Site language is Chinese with some English)

March 15 – 16, 2008

• MomoCon – Atlanta, Georgia (USA)
• Toronto AnimeCon – Toronto, Ontario (Canada)

March 21 – 23, 2008

• Anime Boston – Boston, Massachusetts (USA)
• Anime Express – Daytona Beach, Florida (USA)
• Anime Matsuri – The Woodlands, Texas (USA)
• AniZona – Litchfield Park, Arizona (USA) — Con has been canceled

March 22, 2008

• Seito ChibiCon – San Jose, California (USA)

March 27 – 30, 2008

• Tokyo International Anime Fair – Tokyo, Japan (Site languages are Japanese and English)

March 28 – 30, 2008

• Anime St. Louis – St. Louis, Missouri (USA)
• ConBust – Northampton, Massachusetts (USA) — (Con has a focus on women in science fiction/fantasy/anime/gaming)
• JAMPcon – Chattanooga, Tennessee (USA)

• Naruto Trek Convention – Ft. Lauderdale, Florida (USA) — (As the name implies, the Con has a focus on Naruto and Star Trek)
• Sakura-Con – Seattle, Washington (USA)
• Supanova Pop Culture Expo – Melbourne, Victoria (Australia)

March 29, 2008

• Animarathon – Bowling Green, Ohio (USA)
• Tosho-Con – Largo, Florida (USA)

March 29 – 30, 2008

• ConTopia – Wuppertal, Germany (Site language is German)

• MAGNIFIcon – Kraków, Poland (Site language is Polish)

April 4 – 6, 2008

• Anime Detour – Bloomington, Minnesota (USA)
• EyeCon – Orlando, Florida (USA) — (a multi-genre Celebrity Autograph Convention)
• I-Con – Stony Brook, NY — (Primarily a Science Fiction Convention)
• Supanova Pop Culture Expo – Brisbane, Queensland (Australia)

April 5, 2008

• ChibiFest – Las Vegas, Nevada (USA)

April 5 – 6, 2008

• FreeCon – Tallahassee, Florida (USA)
• The Asian Karaoke Idol Invitational – Philadelphia, Pennsylvania (USA)

April 11 – 13, 2008

• Anime Punch! – Columbus, Ohio (USA)
• J-Junk – Groß-Gerau, Germany (Site language is German)
• Tekkoshocon – Pittsburgh, Pennsylvania (USA)
• UBCon – Buffalo, New York (USA) — (Primarily a Gaming Convention)

April 12, 2008

• O-Conn – Helotes, Texas (USA)

April 12 – 13, 2008

• Game Anime Manga Experience – Paris, France (Site language is French)

April 13, 2008

• Castle Point Anime Convention – Hoboken, New Jersey (USA)

April 17 – 20, 2008

• Saló Internacional del Còmic – Barcelona, Spain (Site language is Spanish) — (Primarily a Comics Convention)

April 18 – 20, 2008

• Kawaii Kon – Honolulu, Hawaii (USA)

• New York Comic Con – New York, New York (USA) — (Primarily a Comics Convention)
• No Brand Con – Eau Claire, Wisconsin (USA)

April 19, 2008

• Anime Fannatiku – St. George, Utah (USA)

April 19 – 20, 2008

• Armageddon Expo Wellington – Wellington, New Zealand

April 20, 2008

• Shinboku Con – Elyria, Ohio (USA)

April 24 – 27, 2008

• BotCon – Cincinnati, Ohio (USA) — (Primarily a Transformers Convention)

April 25 – 27, 2008

• Gen Con Paris – Montreuil, France (Site language is French with summaries in English, German, and Spanish) — (Primarily a Gaming Convention)

• Middle Tennessee Anime Convention – Nashville, Tennessee (USA)

April 25 – 28, 2008

• 

  Costume-Con – San Jose, California (USA) — (a Con for professional and hobbyist costumers)

April 26, 2008

• Minifest – Melbourne, Victoria (Australia) — (a miniature version of Manifest)
• Shukuya-Con – Clearwater, Florida (USA)
• Tora-Con – Rochester, NY

April 26 – 27, 2008

• Armageddon Expo Christchurch – Christchurch, New Zealand
• Calgary Comic & Entertainment Expo – Calgary, Alberta (Canada)