This is a listing of sports nicknames beginning with the letter "I".
- ICE - Indiana (USHL), Winnipeg/Kootenay/Edmonton (WHL), Georgina (PJHL)
- ICE BATS - Austin (CHL)
- ICE BEARS - Knoxville (SPHL)
- ICEBREAKERS/ICE BREAKERS - Chesapeake (ECHL), Hope/Mission (PJHL), Mentor (FPHL)
- ICECAPS - St. John's (AHL)
- ICECATS - Worcester (AHL)
- ICEDIGGERS - Alpena (NAHL)
- ICE DOGS - Niagara (OHL), Fairbanks (NAHL), Bozeman (NA3HL), Long Beach (ECHL/WCHL), Dryden (SIJHL)
- ICE FLYERS - Pensacola (SPHL), Nashville (CHL)
- ICE GATORS - Louisiana (SPHL/ECHL)
- ICE HAULERS - Sandusky (Great Lakes Collegiate League)
- ICE HAWKS/ICEHAWKS - Delta (PJHL), Milton (OJHL), Port Huron (UHL), Rochester (NA3HL)
- ICEHOGS - Rockford (AHL)
- ICEMEN - Evansville (ECHL)
- ICE MINERS - Indiana (MAHL)
- ICE PILOTS - Pensacola (ECHL)
- ICE PIRATES - Lake Charles (ECHL)
- ICE RAYS - Corpus Christi (NAHL)
- ICE SHARKS - Fargo-Moorhead (USHL)
- ICE WOLVES - La Ronge (SJHL), New Mexico (NAHL)
- ICHABODS - Washburn University KS
- IDEAL - Collège Andrè-Laurendeau Quebec
- IGNITION - Detroit (MISL)
- IGUANAS - San Antonio (CHL)
- IKEY TIGERS - University of Cape Town South Africa
- ILLINEKS - Urbana University HS IL
- ILLINI - University of Illinois
- IMPS - Cary HS NC, El Centro (Southwest International League)
- IMPACT - Montreal (MLS)
- IMPALAS - Fort Collins Poudre HS CO
- IMPERIALS - Napoleon HS ND, Sugar Land (NA3HL), El Centro (Sunset League)
- INCUBATORS - Petaluma/Elmhurst (Central California League)
- INDEES - Independence HS WI
- INDEPENDENCE - Charlotte (USL), Philadelphia (WPS)
- INDEPENDENTS - Rock Island (NFL)
- INDIANS - Link to "Indians" page
- INDIAN HEADS - Northwest Indian Bible HS MT
- INDIAN RAIDERS - Philadelphia Archbishop Ryan HS PA
- INDIENS - Collège Ahuntsic Quebec
- INDIOS - Juarez (Southwest International League)
- INFANTS - Hancock (Copper Country Soo League), Quincy (Illinois-Indiana-Iowa League)
- INFERNO - Alverno College WI, Columbia (ECHL), Phoenix (MISL)
- INGOTS - River Forest HS IN
- INJUNS - Lemont HS IL
- INOUK - Granby (QJHL)
- INSURGENTS - Salina (Kansas State League)
- INTERNATIONALS - Cleveland (USL PDL)
- INTIMIDATORS - Kannapolis (South Atlantic League)
- INTRUDERS - Paterson (Hudson River League)
- INVADERS - Oakland (USFL), Roswell (Pecos League)
- INVENTORS - Queens Thomas Edison HS NY, Rochester Edison Tech-Monroe HS NY
- IRISH - University of Notre Dame IN, La Palma Kennedy HS CA, San Francisco Sacred Heart Cathedral HS CA, Dublin HS GA, Kankakee Bishop McNamara HS IL, Peoria Notre Dame HS IL, Seneca Hs IL, Indianapolis Cathedral HS IN, Harper Woods Notre Dame HS MI, Kalamazoo Hackett HS MI, Mount Pleasant Sacred Heart HS MI, Portage Notre Dame HS MI, Springfield Catholic HS MO, Falls City Sacred Heart HS NE, Akron St. Vincent-St. Mary HS OH, Father Ryan HS TN, Freedom HS WI, Sacred Heart College CA, Lucan (PJHL)
- IRISH LADS - Wichita Falls (Texas-Oklahoma League)
- IRON - Birmingham (AAF), Milwaukee (af2)
- IRONBIRDS - Aberdeen (New York-Penn League)
- IRONHEADS - Eufaula HS OK, Iron Range (SIJHL)
- IRON MAIDENS - San Francisco (USAFL)
- IRONMEN - Vermillion CC MN (men), Holt HS AL, Normal Community HS IL, Mancelona HS MI, Danville HS PA, Seattle (WHL), West Michigan (CIF), South Wales (Rugby League 1), Lorain County (Great Lakes Summer Collegiate League), Jamestown (NAHL), Wingham (PJHL)
- IRON MIKES - Trenton Catholic Academy HS NJ
- IRONPIGS - Lehigh Valley (International League)
- IRON RANGERS - Marquette (USHL), Minnesota (SIJHL)
- IRONWOMEN - Vermillion CC MN (women)
- IRRIGATORS - Newell HS SD, Bozeman (Inter-Mountain League)
- ISLANDERS - New York (NHL), Texas A&M University-Corpus Christi, Charlottetown (QMJHL), John Abbott College Quebec, Nelson Island HS AK, Coronado HS CA, Beaver Island HS MI, Harrisburg (New York State League), Puerto Rico (NASL), Gananoque (PJHL), Puerto Rico (Empire Pro League), Thornhill (OJHL)
- ISOTOPES - Albuquerque (Pacific Coast League)
- ITALIANS - Brooklyn (NPSL)
- IZZIES - Wichita (Western League)