Collegiate chapters

Alabama

• Tau Delta, Birmingham Southern College, 1925
• Delta Delta, Auburn University, 1946
• Alpha Delta, The University of Alabama, 1967
• Gamma Delta, University of South Alabama, 1969
• Sigma Delta, Huntingdon College, 1976
• Zeta Pi, University of Alabama Birmingham, 1987
• Delta Epsilon, Jacksonville State University, 1990
• Rho Delta, Samford University, 1995
• Alpha Kappa, University of North Alabama (inactive)

• Theta Omega, Northern Arizona University, 1963
• Upsilon Alpha, University of Arizona (inactive)

• Sigma Omicron, Arkansas State University, 1949
• Xi Omicron, University of Arkansas, 2007

• Sigma, University of California Berkeley, 1907
• Lambda, Stanford University, 1910 (Greek life abolished 1944)
• Delta Sigma, San Jose State University, 1948
• Lambda Beta, California State University Long Beach, 1965
• Chi Alpha, University of California Davis, 1975 (inactive)
• Chi Psi, California Polytechnic State University, San Luis Obispo, 1986
• Lambda Alpha, University of LaVerne, 2007
• Sigma Phi, California State University Northridge, 1967
• Kappa Theta, University of California Los Angeles (inactive)
• Lambda Iota, University of California San Diego (inactive)
• Nu Lambda, University of Southern California (inactive)

• Chi Delta, University of Colorado, 1927 (inactive)
• Epsilon Gamma, University of Northern Colorado, 2000

• Delta Chi, University of Delaware (inactive)

• Kappa Gamma, Florida Southern College, 1946
• Gamma Omicron, University of Florida, 1948
• Gamma Theta, University of South Florida, 1985
• Pi Theta, Florida International University, 2001
• Mu Lambda, Rollins College, 2002
• Alpha Beta, Florida Atlantic University (inactive)
• Alpha Pi, Florida State University (inactive)
• Gamma Upsilon, St. Leo College (inactive)

• Lambda Sigma, University of Georgia, 1935
• Gamma Sigma, Georgia State University, 1956
• Lambda Chi, LaGrange College, 1971
• Alpha Lambda, Georgia Southern University, 1988
• Delta Lambda, Columbus State University, 2008

• Beta Sigma, Boise State University (inactive)
• Iota Alpha, Idaho State University (inactive)

• Iota, University of Illinois, 1911
• Phi Chi, University of Chicago, 1985
• Delta Rho, DePaul University, 1996
• Epsilon Sigma, Quincy University, 1999
• Beta Lambda, Illinois Wesleyan University (inactive)
• Epsilon Iota, Eastern Illinois University (inactive)
• Gamma Iota, Southern Illinois University (inactive)
• Nu Iota, Northern Illinois University (inactive)
• Rho, Northwestern University (inactive)
• Sigma Iota, Western Illinois University (inactive)

• Beta Phi, Indiana University, 1916
• Chi Lambda, University of Evansville, 1951
• Kappa Kappa, Ball State University, 1952
• Kappa Alpha, Indiana State University, 1953
• Delta Xi, Rose-Hulman Institute of Technology, 2007
• Beta Theta, Butler University (inactive)
• Phi Omicron, Hanover College (inactive)
• Phi Upsilon, Purdue University (inactive)
• Theta, DePauw University (inactive)

• Nu Sigma, Parsons College, 1964 (College closed - inactive since 1966)
• Theta Chi, Morningside College, 1966
• Iota Sigma, Iowa State University, 1968
• Alpha Theta, Coe College, 1969

• Phi, University of Kansas (inactive)

• Delta Omega, Murray State University, 1961
• Alpha Chi, Western Kentucky University, 1965
• Kappa Omega, University of Kentucky, 1982
• Pi Alpha, University of Louisville, 1983
• Epsilon Omega, Eastern Kentucky University, 1987
• Tau Omega, Transylvania University, 1987
• Alpha Beta Tau, Thomas More College (inactive)
• Beta Chi, Kentucky Wesleyan College (inactive)
• Omega Xi, Morehead State University (inactive)

• Delta Beta, University of Louisiana at Lafayette, 1956
• Lambda Tau, The University of Louisiana at Monroe, 1958
• Kappa Tau, Southeastern Louisiana University, 1963
• Kappa Chi, Northwestern State University, 1997
• Alpha Omicron, Louisiana State University (inactive)
• Chi Sigma, Centenary College (inactive)
• Pi, Sophie Newcomb Memorial College, Tulane University (inactive)

• Gamma, University of Maine, 1908

• Pi Delta, University of Maryland, 1924
• Sigma Tau, Washington College, 1938
• Theta Beta, Towson University, 1986

• Delta, Tufts University, 1908
• Chi Pi, Northeastern University (inactive)

• Beta Gamma, Michigan State University, 1934
• Kappa Rho, Western Michigan University, 1951
• Lambda Eta, Grand Valley State University, 1989
• Beta Pi, Eastern Michigan University (inactive)
• Omicron Pi, University of Michigan (inactive)

• Tau, University of Minnesota, 1912
• Beta Epsilon, Bemidji State University (inactive)

• Nu Beta, University of Mississippi, 1958

• Delta Pi, Central Missouri State University, 1962
• Delta Alpha, University of Missouri (inactive)
• Lambda Omega, Northwest Missouri State University (inactive)
• Upsilon Epsilon, St. Louis University (inactive)

• Alpha Phi, Montana State University, 1917
• Beta Rho, University of Montana (inactive)

• Zeta, University of Nebraska Lincoln, 1903
• Phi Sigma,University of Nebraska Kearney, 1969
• Nu Zeta, Chadron State College (inactive)

• Alpha, Barnard College of Columbia University, 1897 (Greek Life abolished 1914)
• Epsilon, Cornell University, 1908
• Theta Pi, Wagner College, 1951
• Sigma Chi, Hartwick College, 1952
• Delta Psi, University at Albany-State University of New York, 1989
• Chi, Syracuse University (inactive)
• Nu, New York University (inactive)
• Nu Delta, Canisius College (inactive)
• Psi Delta, C.W. Post Campus of Long Island University (inactive)

• Zeta Psi, East Carolina University, 1960
• Delta Upsilon, Duke University, 1979
• Epsilon Chi, Elon University, 1987
• Colony, Sigma Gamma, Appalachian State University, Fall 2008

• Omega, Miami University, 1919
• Theta Psi, University of Toledo, 1944
• Omega Upsilon, Ohio University, 1988
• Alpha Psi, Bowling Green State University, 1989
• Chi Epsilon, Ohio State University, 1993
• Alpha Tau, Denison University (inactive)
• Kappa Delta, Wright State University (inactive)
• Kappa Pi, Ohio Northern University (inactive)
• Phi Lambda, Youngstown State University (inactive)
• Theta Eta, University of Cincinnati (inactive)

• Xi, University of Oklahoma, 1924
• Chi Theta, Northeastern State University, 1997
• Chi Omicron, Central State University (inactive)

• Alpha Rho, Oregon State University (inactive)
• Alpha Sigma, University of Oregon (inactive)
• Rho Sigma, Portland State University (inactive)

• Epsilon Alpha, Pennsylvania State University, 1929
• Sigma Rho, Slippery Rock University, 1966
• Phi Beta, East Stroudsburg University, 1969
• Lambda Upsilon, Lehigh University, 1984
• Tau Lambda, Shippensburg University, 1984
• Sigma Beta, Saint Joseph's University, 2005
• Beta Delta, Villanova University (inactive)
• Gamma Beta, Indiana University of Pennsylvania (inactive)
• Psi, University of Pennsylvania (inactive)
• Theta Kappa, West Chester University (inactive)

• Beta, Brown University, 1908 (Greek Life abolished 1908)

• Chi Phi, University of South Carolina - Aiken, 2006
• Delta Phi, University of South Carolina (inactive)

• Omicron, University of Tennessee Knoxville, 1902
• Nu Omicron, Vanderbilt University, 1917
• Kappa Omicron, Rhodes College, 1925
• Omega Omicron, Lambuth University, 1957
• Tau Omicron, University of Tennessee Martin, 1966
• Rho Omicron, Middle Tennessee State University, 1985
• Lambda Omicron, Cumberland University, 1999
• Phi Alpha, East Tennessee State University (inactive)
• Pi Omicron, Austin Peay State University (inactive)

• Upsilon Lambda, The University of Texas, San Antonio, 1978
• Delta Theta, Texas Woman's University, 1984
• Nu Kappa, Southern Methodist University (inactive)
• Pi Kappa, University of Texas, Austin (inactive)
• Rho Alpha, Pan American University (inactive)
• Zeta Kappa, Southwest Texas State University (inactive)

• Gamma Tau, Utah State University (inactive)

• Gamma Alpha George Mason University
• Kappa, Randolph-Macon Women's College, 1903 (Greek Life abolished 1960)
• Rho Beta, Virginia Commonwealth University, 1985, Re-Installed 2008
• Chi Beta, University of Virginia (inactive)

• Alpha Gamma, Washington State University, 1932
• Tau Gamma, Eastern Washington University, 1989
• Upsilon, University of Washington (inactive)

• Sigma Alpha, West Virginia University, 1986
• Phi Kappa, Morris Harvey College (inactive)

• Kappa Sigma, University of Wisconsin River Falls, 1993
• Eta, University of Wisconsin-Madison (inactive)
• Iota Tau, University of Wisconsin Stout (inactive)
• Lambda Phi, University of Wisconsin Whitewater (inactive)
• Phi Delta, University of Wisconsin Milwaukee (inactive)
• Sigma Lambda, University of Wisconsin La Crosse (inactive)
• Sigma Sigma, St. Norbert College (inactive)

• Kappa Lambda, University of Calgary, 1985

• Beta Kappa, University of British Columbia (inactive)

• Beta Tau, University of Toronto, 1930
• Iota Chi, University of Western Ontario, 1986
• Gamma Chi, Carleton University, 1992
• Lambda Epsilon, University of Waterloo, 2008

• Kappa Phi, McGill University, 1939

Alabama

• Birmingham Alumnae
• Huntsville Alumnae
• Mobile Alumnae
• Montgomery Alumnae
• Tuscaloosa Alumnae

• Phoenix Alumnae
• Tucson Alumnae

• Jonesboro Alumnae
• Little Rock Area Alumnae
• Northeast Oklahoma/Northwest Arkansas Alumnae

• East Bay Alumnae
• Greater Los Angeles Alumnae
• Long Beach Alumnae
• North Bay Alumnae
• Northern Orange Co. Alumnae
• Palo Alto Alumnae
• San Diego Alumnae
• San Fernando Valley Alumnae
• San Gabriel Valley Alumnae
• San Jose Alumnae
• San Mateo Alumnae
• Santa Barbara Alumnae
• South Bay/Palos Verdes Alumnae
• Southern Orange County Alumnae
• Ventura County Alumnae

• Denver Alumnae
• Rocky Mountain Alumnae

• No Alumnae Chapters

• Delaware Alumnae

• Fort Lauderdale Alumnae
• Greater Lee County Alumnae
• Greater Miami Alumnae
• Greater Pensacola Alumnae
• Greater Pinellas Alumnae
• Orlando Area Alumnae
• Palm Beach County Alumnae
• Sarasota Area Alumnae
• Tampa Bay Alumnae

• Athens Alumnae
• Atlanta Alumnae
• Middle Georgia Alumnae
• Savannah Alumnae

• Pocatello Alumnae

• Bloomington-Normal Alumnae
• Champaign-Urbana Alumnae
• Chicago City Alumnae
• Chicago North Shore Alumnae
• Chicago NW Suburban Alumnae
• Chicago South Suburban Alumnae
• Chicago West Suburban Alumnae
• DeKalb-Kane Alumnae
• Lake County of Ill Alumnae

• Bloomington Alumnae
• Evansville Tri-State Alumnae
• Indianapolis Alumnae
• Muncie Alumnae
• Terre Haute Alumnae

• No Alumnae Chapters

• Bowling Green Alumnae
• Central Kentucky Bluegrass Alumnae
• Kentuckiana Alumnae
• Kentucky Lakes Alumnae
• Lexington Alumnae
• Northern Kentucky Alumnae

• Acadiana Alumnae
• Baton Rouge Alumnae
• Hammond Area Alumnae
• Monroe Alumnae
• New Orleans Area Alumnae

• Greater Portland Alumnae

• Baltimore Alumnae
• Suburban Maryland Alumnae

• Boston Alumnae

• Ann Arbor Alumnae
• Dearborn Alumnae
• Detroit N Suburban Alumnae
• Grand Rapids Alumnae
• Macomb County Alumnae

• Minneapolis/St. Paul Alumnae

• Greater Jackson Alumnae

• Greater Kansas City Alumnae
• St. Louis Alumnae

• Bozeman Alumnae

• Kearney Alumnae
• Lincoln Alumnae
• Omaha Alumnae

• Las Vegas Alumnae

• Central New Jersey Alumnae

• Central New Mexico Alumnae

• Buffalo Alumnae
• Long Island Alumnae
• New York Capital Region Alumnae
• New York City Area Alumnae
• NY/NJ Metro Alumnae
• Rochester Alumnae

• Charlotte Alumnae
• Greater Greenville Alumnae
• Piedmont, NC Alumnae
• Triangle Alumnae
• Winston-Salem Alumnae

• Cincinnati Alumnae
• Cleveland Area Alumnae
• Cleveland West Alumnae
• Columbus Alumnae
• Dayton Alumnae
• Toledo Area Alumnae

• Tulsa Alumnae

• Portland Alumnae

• Bucks County Alumnae
• Greater Harrisburg Alumnae
• Lehigh Valley Alumnae
• Philadelphia Alumnae
• State College Alumnae

• Charleston Alumnae

• Knoxville Alumnae
• Memphis Area Alumnae
• Nashville Area Alumnae

• Austin Alumnae
• Dallas Alumnae
• Denton County Alumnae
• Houston Alumnae
• San Antonio Alumnae

• Salt Lake City Alumnae

• Northern Virginia Alumnae
• Richmond Area Alumnae
• Virginia Tidewater Alumnae
• Williamsburg Alumnae

• Palouse Area Alumnae
• Seattle Alumnae

• Madison Alumnae
• Milwaukee Alumnae

AOII's chapter names are unique compared to other Greek groups. Most sororities and fraternities are named sequentially, with the first chapter being Alpha, the second Beta, and so on. Breaking from this tradition, AOII does not dictate its chapter designations. Each colony of the fraternity selects its own chapter name and corresponding sub-motto. In this way, chapter designations have special meaning for the members. AOII's oldest operating chapter is Omicron at the University of Tennessee, which was the fraternity's fourth chapter. (The first three chapters were Alpha at Barnard/Columbia, Pi at Sophie Newcomb/Tulane, and Nu at New York University.)