# List of Sigma Xi chapters

Following is a list of Sigma Xi chapters. Sigma Xi is an international scientific research honor society. In addition to collegiate chapters, the society maintains area and company-based chapters. Active chapters are indicated in bold. Inactive chapters or institutions are in italics.
| Chapter | Charter date and range | Institution or area | Location | Status |
| Cornell | November 1886 | Cornell University | Ithaca, New York | Active |
| R.P.I. | 1887 | Rensselaer Polytechnic Institute | Troy, New York | Active |
| Union | 1887 | Union College | Schenectady, New York | Active |
| Kansas | 1890 | University of Kansas | Lawrence, Kansas | Active |
| Yale | 1895 | Yale University | New Haven, Connecticut | Active |
| Minnesota | 1896 | University of Minnesota | Minneapolis, Minnesota | Active |
| Nebraska | 1897 | University of Nebraska–Lincoln | Lincoln, Nebraska | Active |
| Ohio State | 1898 | Ohio State University | Columbus, Ohio | Active |
| Penn | 1899 | University of Pennsylvania | Philadelphia, Pennsylvania | Active |
| Brown | 1900 | Brown University | Providence, Rhode Island | Active |
| Iowa | 1900 | University of Iowa | Iowa City, Iowa | Active |
| Stanford | 1901 | Stanford University | Stanford, California | Active |
| California | 1902 | University of California, Berkeley | Berkeley, California | Active |
| Columbia | 1902 | Columbia University | New York City, New York | Active |
| Chicago | 1903 | University of Chicago | Chicago, Illinois | Active |
| Michigan | 1903 | University of Michigan | Ann Arbor, Michigan | Active |
| Case Western Reserve | 1904 | Case Western Reserve University | Cleveland, Ohio | Active |
| Indiana | 1904 | Indiana University Bloomington | Bloomington, Indiana | Active |
| Colorado | 1905 | University of Colorado Boulder | Boulder, Colorado | Active |
| Missouri | 1905 | University of Missouri | Columbia, Missouri | Active |
| Northwestern | 1906 | Northwestern University | Evanston, Illinois | Active |
| Syracuse | 1906 | Syracuse area | Syracuse, New York | Active |
| Washington | 1907 | University of Washington | Seattle, Washington | Active |
| Wisconsin, Madison | 1907 | University of Wisconsin–Madison | Madison, Wisconsin | Active |
| Worcester Tech | 1908 | Worcester Polytechnic Institute | Worcester, Massachusetts | Active |
| Purdue | 1909 | Purdue University | West Lafayette, Indiana | Active |
| Washington (MO) | 1910 | Washington University in St. Louis | St. Louis, Missouri | Active |
| District of Columbia | 1915 | District of Columbia area | Washington, D.C. | Active |
| Texas | 1915 | University of Texas at Austin | Austin, Texas | Active |
| Mayo Foundation | 1920 | Mayo Clinic | Rochester, Minnesota | Active |
| North Carolina | 1920 | University of North Carolina at Chapel Hill | Chapel Hill, North Carolina | Active |
| North Dakota | 1920 | University of North Dakota | Grand Forks, North Dakota | Active |
| Iowa State | 1921 | Iowa State University | Ames, Iowa | Active |
| Idaho | 1922 | University of Idaho | Moscow, Idaho | Active |
| Kentucky | 1922 | University of Kentucky | Lexington, Kentucky | Active |
| McGill | 1922 | McGill community | Montreal, Quebec, Canada | Active |
| Rutgers | 1922 | Rutgers University–New Brunswick | Piscataway, New Jersey | Active |
| Oregon | 1923 | University of Oregon | Eugene, Oregon | Active |
| Swarthmore | 1923 | Swarthmore College | Swarthmore, Pennsylvania | Active |
| Caltech | 1924 | California Institute of Technology | Pasadena, California | Active |
| Johns Hopkins | 1924 | Johns Hopkins University | Baltimore, Maryland | Active |
| Virginia | 1924 | University of Virginia | Charlottesville, Virginia | Active |
| Cincinnati | 1926 | University of Cincinnati | Cincinnati, Ohio | Active |
| NYU | 1926 | New York University | New York City, New York | Active |
| Michigan State | 1927 | Michigan State University | East Lansing, Michigan | Active |
| Arizona | 1928 | University of Arizona | Tucson, Arizona | Active |
| Duke | 1928 | Duke University | Durham, North Carolina | Active |
| Illinois, Chicago Medicine | 1928–19xx ? | University of Illinois College of Medicine | Chicago, Illinois | Inactive |
| Kansas State | 1928 | Kansas State University | Manhattan, Kansas | Active |
| Lehigh | 1928 | Lehigh University | Bethlehem, Pennsylvania | Active |
| Maryland | 1928 | University of Maryland, College Park | College Park, Maryland | Active |
| Oklahoma | 1930 | University of Oklahoma | Norman, Oklahoma | Active |
| Penn State | 1930 | Pennsylvania State University | University Park, Pennsylvania | Active |
| Rochester | 1930 | University of Rochester | Rochester, New York | Active |
| Washington State | 1930 | Washington State University | Pullman, Washington | Active |
| Wyoming | 1930 | Wyoming statewide | Laramie, Wyoming | Active |
| Harvard | 1931 | Harvard University | Cambridge, Massachusetts | Active |
| Pitt | 1931 | University of Pittsburgh | Pittsburgh, Pennsylvania | Active |
| Princeton | 1932 | Princeton University | Princeton, New Jersey | Active |
| Western Reserve | 1932 | Western Reserve University | Cleveland, Ohio | Consolidated |
| UCLA | 1933 | University of California, Los Angeles | Los Angeles, California | Active |
| MIT | 1934 | Massachusetts Institute of Technology | Cambridge, Massachusetts | Active |
| Greater New Orleans | 1934 | Greater New Orleans | New Orleans, Louisiana | Active |
| Carleton | 1935 | Carleton College | Northfield, Minnesota | Active |
| Smith | 1935 | Smith College | Northampton, Massachusetts | Active |
| Wesleyan | 1935 | Wesleyan University | Middletown, Connecticut | Active |
| SUNY Buffalo | 1936 | University at Buffalo | Buffalo, New York | Active |
| Carnegie Mellon | 1937 | Carnegie Mellon University | Pittsburgh, Pennsylvania | Active |
| George Washington | 1937 | George Washington University | Washington, D.C. | Active |
| Oregon State | 1937 | Oregon State University | Corvallis, Oregon | Active |
| Utah | 1937 | University of Utah | Salt Lake City, Utah | Active |
| Florida | 1938 | University of Florida | Gainesville, Florida | Active |
| Massachusetts | 1938 | University of Massachusetts Amherst | Amherst, Massachusetts | Active |
| Rice | 1938 | Rice University Texas Medical Center | Houston, Texas | Active |
| Wellesley | 1938 | Wellesley College | Wellesley, Massachusetts | Active |
| Alabama | 1939 | University of Alabama | Tuscaloosa, Alabama | Active |
| West Virginia | 1939 | West Virginia University | Morgantown, West Virginia | Active |
| USC | 1940 | University of Southern California | Los Angeles, California | Active |
| Virginia Tech | 1940 | Virginia Tech | Blacksburg, Virginia | Active |
| Bryn Mawr | 1941 | Bryn Mawr College | Bryn Mawr, Pennsylvania | Active |
| Oberlin | 1941 | Oberlin College | Cleveland, Ohio | Active |
| Illinois State/Illinois Wesleyan | 1942 | Illinois State University and Illinois Wesleyan University | Normal, Illinois | Active |
| Illinois Tech | 1942 | Illinois Institute of Technology | Chicago, Illinois | Active |
| LSU | 1942 | Louisiana State University | Baton Rouge, Louisiana | Active |
| Utah State | 1942 | Utah State University | Logan, Utah | Active |
| Polytechnic/SUNY Old Westbury | 1943 | New York Institute of Technology | Old Westbury, New York | Active |
| Radcliffe | 1943–19xx ? | Radcliffe College | Cambridge, Massachusetts | Inactive |
| Tufts | 1943 | Tufts University | Medford, Massachusetts | Active |
| Emory | 1944 | Emory University | Atlanta, Georgia | Active |
| NC State | 1944 | North Carolina State University | Raleigh, North Carolina | Active |
| St. Louis University | 1944 | Saint Louis University | St. Louis, Missouri | Active |
| Vanderbilt | 1944 | Vanderbilt University | Nashville, Tennessee | Active |
| Wayne State | 1944 | Wayne State University | Detroit, Michigan | Active |
| Catholic | 1945 | Catholic University of America | Washington, D.C. | Active |
| Connecticut | 1945 | University of Connecticut | Storrs, Connecticut | Active |
| Texas Southwestern Medical Center | 1945 | University of Texas Southwestern Medical Center | Dallas, Texas | Active |
| Georgia | 1946 | University of Georgia | Athens, Georgia | Active |
| State University of West Georgia | 1946–c. 1986 | State University of West Georgia | Carrollton, Georgia | Inactive |
| Vermont | 1946 | Vermont statewide | Northfield, Vermont | Active |
| California Davis | 1947 | University of California, Davis | Davis, California | Active |
| Hawaii | 1947 | University of Hawaiʻi at Mānoa | Manoa, Hawaii | Active |
| Rockford | 1947 | Rockford University | Rockford, Illinois | Active |
| Maine | 1948 | University of Maine | Orono, Maine | Active |
| San Diego | 1948 | San Diego area | San Diego, California | Active |
| Frederick | 1949 | Frederick and Rockville area | Rockville, Maryland | Active |
| Oklahoma State | 1949 | Oklahoma State University–Stillwater | Stillwater, Oklahoma | Active |
| Temple | 1949 | Temple University | Philadelphia, Pennsylvania | Active |
| Amherst | 1950 | Amherst College | Amherst, Massachusetts | Active |
| Auburn | 1950 | Auburn University | Auburn, Alabama | Active |
| Brigham Young | 1950 | Brigham Young University | Provo, Utah | Active |
| CDC | 1950 | Centers for Disease Control and Prevention | Atlanta, Georgia | Active |
| Denver | 1950 | University of Denver | Denver, Colorado | Active |
| Montana State | 1950 | Montana State University | Bozeman, Montana | Active |
| Naval Research Laboratory-Edison | 1950 | United States Naval Research Laboratory - Edison | Washington, D.C. | Active |
| Tennessee | 1950 | University of Tennessee | Knoxville, Tennessee | Active |
| NYU Dentistry | 1951 | New York University College of Dentistry | New York City, New York | Active |
| Texas A&M | July 1, 1951 | Texas A&M University | College Station, Texas | Active |
| Alfred | 1952 | Alfred University | Alfred, New York | Active |
| Argonne | 1952 | Argonne National Laboratory | Argonne, Illinois | Active |
| Boston | 1952 | Boston University | Boston, Massachusetts | Active |
| Notre Dame | 1952 | University of Notre Dame | Notre Dame, Indiana | Active |
| Columbia-Willamette | 1952 | Columbia River and Willamette River area | Portland, Oregon | Active |
| Kansas City | 1952 | Kansas City area | Kansas City, Missouri | Active |
| Triple Cities New York | 1952 | Binghamton area | Binghamton, New York | Active |
| Alamo | 1953 | San Antonio area | San Antonio, Texas | Active |
| Arconic | 1953 | New Kensington area | New Kensington, Pennsylvania | Active |
| Arkansas | 1953 | University of Arkansas | Fayetteville, Arkansas | Active |
| Colorado State | 1953 | Colorado State University | Fort Collins, Colorado | Active |
| Georgia Institute of Technology | 1953 | Georgia Tech | Atlanta, Georgia | Active |
| Rhode Island | 1953 | University of Rhode Island | Kingston, Rhode Island | Active |
| Rollins College | 1953 | Rollins College | Winter Park, Florida | Active |
| Tuskegee University | 1953 | Tuskegee University | Tuskegee, Alabama | Active |
| Brooklyn | 1954 | Brooklyn College | Brooklyn, New York | Active |
| Franklin and Marshall | 1954 | Franklin & Marshall College | Lancaster, Pennsylvania | Active |
| Lamar | 1954 | Lamar University | Beaumont, Texas | Active |
| Missouri S&T | 1954 | Missouri University of Science and Technology | Rolla, Missouri | Active |
| New Hampshire | 1954 | University of New Hampshire | Durham, New Hampshire | Active |
| New Mexico | 1954 | University of New Mexico | Albuquerque, New Mexico | Active |
| Stevens Tech | 1954 | Stevens Institute of Technology | Hoboken, New Jersey | Active |
| Texas, Medical | 1954 | University of Texas Medical Branch | Galveston, Texas | Active |
| Florida State | 1955 | Florida State University | Tallahassee, Florida | Active |
| Louisville | 1955 | Louisville area | Louisville, Kentucky | Active |
| Loyola, Chicago | 1955 | Loyola University Chicago | Chicago, Illinois | Active |
| Tennessee, Medical | 1956 | | Tennessee | Inactive |
| Texas Woman's University | 1956 | Texas Woman's University | Denton, Texas | Active |
| Chesapeake | 1957 | Aberdeen Proving Ground | Aberdeen, Maryland | Active |
| Alabama, Birmingham | 1957 | University of Alabama at Birmingham | Birmingham, Alabama | Active |
| Army Research Laboratory | 1957 | United States Army Research Laboratory | Adelphi, Maryland | Active |
| Denison | 1957 | Denison University | Granville, Ohio | Active |
| Howard | 1957 | Howard University | Washington, D.C. | Active |
| Natick | 1957 | Natick area | Natick, Massachusetts | Active |
| New Mexico State | 1957 | New Mexico State University | Las Cruces, New Mexico | Active |
| Ohio Wesleyan | 1957 | Ohio Wesleyan University | Delaware, Ohio | Active |
| South Dakota | 1957 | University of South Dakota | Vermillion, South Dakota | Active |
| Fordham | 1958 | Fordham University | The Bronx, New York | Active |
| Louisiana Tech | 1958 | Louisiana Tech University | Ruston, Louisiana | Active |
| Naval Postgraduate School | 1958 | Naval Postgraduate School | Monterey, California | Active |
| Rockefeller | 1958 | Rockefeller University | New York City, New York | Active |
| South Carolina | 1958 | University of South Carolina | Columbia, South Carolina | Active |
| Tahoma | 1958 | Tahoma area | Puyallup, Washington | Active |
| Andrews-Whirlpool | 1959 | Andrews University and Whirlpool Corporation | Berrien Springs, Michigan | Active |
| Delaware | 1959 | University of Delaware | Newark, Delaware | Active |
| Knox | 1959 | Knox College | Galesburg, Illinois | Active |
| Vassar | 1959 | Vassar College | Poughkeepsie, New York | Active |
| Albion | 1960 | Albion College | Albion, Michigan | Active |
| Claremont Colleges | 1960 | Claremont McKenna College, Harvey Mudd College, and Pomona College | Claremont, California | Active |
| Jacksonville | 1960 | Jacksonville area | Jacksonville, Florida | Active |
| Marquette | 1960 | Marquette University | Milwaukee, Wisconsin | Active |
| New Mexico Highlands | 1960 | New Mexico Highlands University | Las Vegas, New Mexico | Active |
| San Francisco State | 1960 | San Francisco State University | San Francisco, California | Active |
| Texas Tech | 1960 | Texas Tech University | Lubbock, Texas | Active |
| University of Massachusetts Lowell | 1960 | University of Massachusetts Lowell | Lowell, Massachusetts | Active |
| Eckerd | 1961 | Eckerd College | St. Petersburg, Florida | Active |
| Ohio | 1961 | Ohio University | Athens, Ohio | Active |
| Puerto Rico at Mayaguez | 1961 | University of Puerto Rico at Mayagüez | Mayagüez, Puerto Rico | Active |
| South Dakota State | 1961 | South Dakota State University | Brookings, South Dakota | Active |
| Ball State | 1962 | Ball State University | Muncie, Indiana | Active |
| Chicago Medical | 1962 | | Chicago, Illinois | Inactive |
| SUNY Stony Brook | 1962 | Stony Brook University | Stony Brook, New York | Active |
| Tidewater Virginia | 1962 | Tidewater | Newport News, Virginia | Active |
| Whitman College-Walla Walla University | 1962 | Whitman College and Walla Walla University | Walla Walla, Washington | Active |
| Central Arkansas | 1963 | Central Arkansas area | Little Rock, Arkansas | Active |
| California Riverside | 1963 | University of California, Riverside | Riverside, California | Active |
| VCU | 1963 | Virginia Commonwealth University | Richmond, Virginia | Active |
| North Dakota State | 1963 | North Dakota State University | Fargo, North Dakota | Active |
| American University | 1964 | American University | Washington, D.C. | Active |
| Montana | 1964 | University of Montana | Missoula, Montana | Active |
| Wichita State | 1964 | Wichita State University | Wichita, Kansas | Active |
| Arizona State | 1965 | Arizona State University | Phoenix, Arizona | Active |
| Black Hills Regional | 1965 | Black Hills region | Rapid City, South Dakota | Active |
| Cincinnati Federal Environmental | 1965 | United States Environmental Protection Agency Cincinnati | Cincinnati, Ohio | Active |
| Colorado Mines | 1965 | Colorado School of Mines | Golden, Colorado | Active |
| Hamilton | 1965 | Hamilton College | Clinton, New York | Active |
| Marshall | 1965 | Marshall University | Huntington, West Virginia | Active |
| Merrimack | 1965 | Merrimack College | North Andover, Massachusetts | Active |
| Northeastern | 1965 | Northeastern University | Boston, Massachusetts | Active |
| Orange County | 1965 | Orange County | San Clemente, California | Active |
| South Dakota Mines | 1965 | South Dakota School of Mines and Technology | Rapid City, South Dakota | Inactive |
| SUNY Plattsburgh | 1965 | State University of New York at Plattsburgh | Plattsburgh, New York | Active |
| Tulsa | 1965 | Tulsa area | Tulsa, Oklahoma | Active |
| Wake Forest | 1965 | Wake Forest University | Winston-Salem, North Carolina | Active |
| Wisconsin-Oshkosh | 1965 | University of Wisconsin–Oshkosh | Oshkosh, Wisconsin | Active |
| Boston College | 1966 | Boston College | Chestnut Hill, Massachusetts | Inactive |
| Charlotte | 1966 | Charlotte area | Charlotte, North Carolina | Active |
| Clemson | 1966 | Clemson University | Clemson, South Carolina | Active |
| Fairleigh Dickinson | 1966 | Fairleigh Dickinson University | Teaneck, New Jersey | Active |
| Greensboro | 1966 | Greensboro area | Greensboro, North Carolina | Active |
| Houston | 1966 | University of Houston | Houston, Texas | Active |
| Idaho State | 1966 | Idaho State University | Pocatello, Idaho | Active |
| Ithaca | 1966 | Ithaca College | Ithaca, New York | Active |
| KU Med | 1966 | University of Kansas Medical Center | Kansas City, Kansas | Active |
| Minnesota State, Mankato | 1966–1968 | Minnesota State University, Mankato | Mankato, Minnesota | Inactive |
| Mississippi State | 1966 | Mississippi State University | Starkville, Mississippi | Active |
| Montana Tech | 1966 | Montana Technological University | Butte, Montana | Active |
| Southern Illinois Carbondale | 1966 | Southern Illinois University Carbondale | Carbondale, Illinois | Active |
| SUNY Fredonia | 1966 | State University of New York at Fredonia | Fredonia, New York | Active |
| Tennessee Tech | 1966 | Tennessee Tech | Cookeville, Tennessee | Active |
| Ursinus | 1966 | Ursinus College | Collegeville, Pennsylvania | Active |
| Weber State University | 1966 | Weber State University | Ogden, Utah | Active |
| Eastern Kentucky University | 1967 | Eastern Kentucky University | Richmond, Kentucky | Active |
| Eastern New Mexico University | 1967 | Eastern New Mexico University | Portales, New Mexico | Active |
| Eastern Washington University Spokane | 1967 | Eastern Washington University Spokane | Spokane, Washington | Active |
| Georgetown | 1967 | Georgetown University | Washington, D.C. | Active |
| John Deere | 1967 | John Deere | Rock Island, Illinois | Active |
| Kent | 1967 | Kent State University | Kent, Ohio | Active |
| Loyola Marymount | 1967 | Loyola Marymount University | Los Angeles, California | Active |
| Mississippi Medical | 1967 | University of Mississippi Medical Center | Jackson, Mississippi | Active |
| Mount Holyoke | 1967 | Mount Holyoke College | South Hadley, Massachusetts | Active |
| Northern Arizona | 1967 | Northern Arizona | Flagstaff, Arizona | Active |
| Ohio Northern | 1967 | Ohio Northern University | Ada, Ohio | Active |
| Puerto Rico at San Juan | 1967 | University of Puerto Rico, Río Piedras Campus | San Juan, Puerto Rico | Active |
| Santa Clara | 1967 | Santa Clara University | Santa Clara, California | Active |
| Sonoma State | 1967 | Sonoma State University | Rohnert Park, California | Active |
| Southern Mississippi | 1967 | University of Southern Mississippi | Hattiesburg, Mississippi | Active |
| Texas Christian | 1967 | Texas Christian University | Fort Worth, Texas | Active |
| Thomas Jefferson | 1967 | Thomas Jefferson University | Philadelphia, Pennsylvania | Active |
| Tri-Cities Washington | 1967 | Richland, Kennewick, and Pasco area | Richland, Washington | Active |
| U.S. Naval Academy | 1967 | United States Naval Academy | Annapolis, Maryland | Active |
| Western Kentucky | 1967 | Western Kentucky University | Bowling Green, Kentucky | Active |
| Baylor | 1968 | Baylor University | Waco, Texas | Active |
| Dartmouth | 1968 | Dartmouth College | Hanover, New Hampshire | Active |
| Gustavus Adolphus | 1968 | Gustavus Adolphus College | St. Peter, Minnesota | Active |
| Manhattan College | 1968 | Manhattan College | The Bronx, New York | Active |
| Manitoba | 1968 | University of Manitoba | Winnipeg, Manitoba, Canada | Active |
| Middle Tennessee State | 1968 | Middle Tennessee State University | Murfreesboro, Tennessee | Active |
| Northern Michigan | 1968 | Northern Michigan University | Marquette, Michigan | Active |
| Queens College | 1968 | Queens College, City University of New York | Queens, New York | Active |
| Scranton | 1968 | University of Scranton | Scranton, Pennsylvania | Active |
| Tifton | 1968 | Tifton area | Tifton, Georgia | Active |
| Western Carolina | 1968 | Western Carolina University | Cullowhee, North Carolina | Active |
| Wisconsin–La Crosse | 1968 | University of Wisconsin–La Crosse | La Crosse, Wisconsin | Active |
| Appalachian State | 1969 | Appalachian State University | Boone, North Carolina | Active |
| Central Florida | 1969 | University of Central Florida | Orlando, Florida | Active |
| Delta | 1969 | Boston area | Boston, Massachusetts | Active |
| Hunter | 1969 | Hunter College | New York City, New York | Inactive |
| Indiana, Indianapolis Medical | 1969 | Indiana University School of Medicine | Indianapolis, Indiana | Active |
| Indiana University | 1969 | Indiana University of Pennsylvania | Indiana, Pennsylvania | Active |
| Miami | 1969 | University of Miami | Coral Gables, Florida | Active |
| Northern Illinois | 1969 | Northern Illinois University | DeKalb, Illinois | Active |
| Southern Illinois Edwardsville | 1969 | Southern Illinois University Edwardsville | Edwardsville, Illinois | Active |
| SUNY Health Science Center | April 8, 1969 | SUNY Downstate Medical Center | Brooklyn, New York | Active |
| Akron | 1969 | University of Akron | Akron, Ohio | Active |
| Nevada | 1969 | University of Nevada, Reno | Reno, Nevada | Active |
| Rider | 1969 | Rider University | Lawrence Township, New Jersey | Active |
| Williams | 1969 | Williams College | Williamstown, Massachusetts | Active |
| Wright State | 1969 | Wright State University | Fairborn, Ohio | Active |
| Albany, New York | 1970 | Albanay area | Albany, New York | Active |
| California Santa Barbara | 1970 | University of California, Santa Barbara | Santa Barbara County, California | Active |
| Central Oklahoma | 1970 | University of Central Oklahoma | Edmond, Oklahoma | Active |
| Hartford | 1970 | University of Hartford | West Hartford, Connecticut | Active |
| Massachusetts Dartmouth | 1970 | University of Massachusetts Dartmouth | North Dartmouth, Massachusetts | Active |
| SUNY Oswego | 1970 | State University of New York at Oswego | Oswego, New York | Active |
| Tennessee at Martin | 1970 | University of Tennessee at Martin | Martin, Tennessee | Active |
| Youngstown State | 1970 | Youngstown State University | Youngstown, Ohio | Active |
| Clarkson | 1971 | Clarkson University | Potsdam, New York | Active |
| CUNY | 1971 | City University of New York | New York City, New York | Active |
| East Stroudsburg | 1971 | East Stroudsburg University of Pennsylvania | East Stroudsburg, Pennsylvania | Active |
| Food and Drug Administration | 1971 | Food and Drug Administration | Washington, D.C. | Active |
| George Mason | 1971 | George Mason University | Fairfax, Virginia | Active |
| Hampden Sydney/Longwood | 1971 | Hampden–Sydney College and Longwood University | Hampden Sydney, Virginia | Active |
| Michigan Tech | 1971 | Michigan Technological University | Houghton, Michigan | Active |
| Montclair State | 1971 | Montclair State University | Montclair, New Jersey | Active |
| National Institute of Standards and Technology | 1971 | National Institute of Standards and Technology | Gaithersburg, Maryland | Active |
| Saint Joseph's | 1971 | Saint Joseph's University | Philadelphia, Pennsylvania | Active |
| Alaska | 1972 | Alaska statewide | Fairbanks, Alaska | Active |
| Drexel | 1972 | Drexel University | Philadelphia, Pennsylvania | Active |
| Miami (OH) | 1972 | Miami University | Oxford, Ohio | Active |
| Texas, Arlington | 1972 | University of Texas at Arlington | Arlington, Texas | Active |
| Mississippi | 1972 | University of Mississippi | University, Mississippi | Active |
| Avalon | 1973 | St. John's area | St. John's, Newfoundland and Labrador, Canada | Active |
| California State Northridge | 1973 | California State University, Northridge | Northridge, Los Angeles, California | Active |
| General Motors R&D Center | 1973 | General Motors Technical Center | Warren, Michigan | Active |
| Newark | 1973 | Rutgers University–Newark | Newark, New Jersey | Active |
| Rush | 1973 | Rush University | Chicago, Illinois | Active |
| Wisconsin-Milwaukee | 1973 | University of Wisconsin–Milwaukee | Milwaukee, Wisconsin | Active |
| East Carolina | 1974 | East Carolina University | Greenville, North Carolina | Active |
| Pace | 1974 | Pace University | Pleasantville, New York | Active |
| Pikes Peak | 1974 | Colorado College and University of Colorado Colorado Springs | Colorado Springs, Colorado | Active |
| Portland State | 1974 | Portland State University | Portland, Oregon | Active |
| Boise State University | 1975 | Boise State University | Boise, Idaho | Active |
| Bowling Green | 1975 | Bowling Green State University | Bowling Green, Ohio | Active |
| Chattanooga | 1975 | University of Tennessee at Chattanooga | Chattanooga, Tennessee | Active |
| Georgia Medical | 1975 | Medical College of Georgia | Augusta, Georgia | Inactive |
| Hawaii Hilo | 1975 | University of Hawaiʻi at Hilo | Hilo, Hawaii | Active |
| Lehman | 1975 | Lehman College | New York City, New York | Active |
| Oakland | 1975–19xx ? | Oakland area | Oakland, California | Inactive |
| Omaha | 1975 | Omaha area | Omaha, Nebraska | Active |
| Texas, El Paso | 1975 | University of Texas at El Paso | El Paso, Texas | Active |
| Dayton | 1975 | University of Dayton | Dayton, Ohio | Active |
| Oakland | 1975 | Oakland University | Rochester, Michigan | Active |
| Ramapo | 1975 | Ramapo College | Mahwah, New Jersey | Active |
| South Alabama | 1975 | University of South Alabama | Mobile, Alabama | Active |
| Loma Linda | 1976 | Loma Linda University | Loma Linda, California | Active |
| New Jersey Tech | 1976 | New Jersey Institute of Technology | Newark, New Jersey | Active |
| Oklahoma Health Science Center | 1976 | University of Oklahoma Health Sciences Center | Oklahoma City, Oklahoma | Active |
| Southern Methodist | 1976 | Southern Methodist University | University Park, Texas | Active |
| Toledo | 1976 | University of Toledo | Toledo, Ohio | Active |
| Abbott Laboratories | 1977 | Abbott Laboratories | Green Oaks, Illinois | Active |
| Guelph | 1977 | University of Guelph | Guelph, Ontario, Canada | Active |
| Murray State | 1978 | Murray State University | Murray, Kentucky | Active |
| Western Connecticut State | 1979 | Western Connecticut State University | Danbury, Connecticut | Active |
| Calgary | 1980 | University of Calgary | Calgary, Alberta, Canada | Active |
| Quinnipiac | 1980 | Quinnipiac area | Hamden, Connecticut | Active |
| Ottawa | 1983 | Ottawa area | Ottawa, |Ontario, Canada | Active |
| Texas at Dallas | 1983 | University of Texas at Dallas | Richardson, Texas | Active |
| University of Toronto | 1983 | University of Toronto | Toronto, Ontario, Canada | Active |
| Philadelphia College | 1984 | Philadelphia College of Osteopathic Medicine | Philadelphia, Pennsylvania | Active |
| Purdue Fort Wayne | 1984 | Purdue University Fort Wayne | Fort Wayne, Indiana | Active |
| Greenbrier Valley | 1985 | Greenbrier Valley area | Lewisburg, West Virginia | Active |
| Northwestern Pennsylvania | 1985 | Northwestern Pennsylvania | Erie, Pennsylvania | Active |
| Rhode Island College | 1985 | Rhode Island College | Providence, Rhode Island | Active |
| Asheville | 1986 | University of North Carolina at Asheville | Asheville, North Carolina | Active |
| Australian | 1986 | Australia nationwide | Murdoch, Western Australia, Australia | Active |
| Nebraska at Kearney | 1986 | University of Nebraska at Kearney | Kearney, Nebraska | Active |
| Wilmington | 1986 | University of North Carolina Wilmington | Wilmington, North Carolina | Active |
| Villanova | 1989 | Villanova University | Villanova, Pennsylvania | Active |
| Woods Hole | 1989 | Woods Hole Oceanographic Institution | Woods Hole, Massachusetts | Active |
| Southern Maine | 1990 | University of Southern Maine | Lewiston, Maine | Active |
| Charleston | 1991 | Charleston area | Charleston, South Carolina | Active |
| Research Triangle Park | 1991 | Research Triangle Park | Research Triangle Park, North Carolina | Active |
| Shenandoah Valley | 1991 | Harrisonburg area | Harrisonburg, Virginia | Active |
| California Irvine | 1991 | University of California, Irvine | Irvine, California | Active |
| South Florida Water Management District | 1992 | South Florida Water Management District | West Palm Beach, Florida | Active |
| Swiss | 1992 | Switzerland nationwide | Bern, Switzerland | Active |
| Southern Oregon | 1993 | Southern Oregon | Ashland, Oregon | Active |
| University of Alberta | 1993 | University of Alberta | Edmonton, Alberta, Canada | Active |
| SUNY Purchase | 1996 | State University of New York at Purchase | Purchase, New York | Active |
| Eastern Illinois | 1997 | Eastern Illinois University | Charleston, Illinois | Active |
| Barry University | 1998 | Barry University | Miami Shores, Florida | Active |
| Grove City | 1998 | Grove City College | Grove City, Pennsylvania | Active |
| South Texas | 1999 | South Texas | Corpus Christi, Texas | Active |
| Fairfield University | 2000 | Fairfield University | Fairfield, Connecticut | Active |
| Carthage | 2001 | Carthage College | Kenosha, Wisconsin | Active |
| Washington College | 2001 | Washington College | Chestertown, Maryland | Active |
| Tarleton State | 2003 | Tarleton State University | Stephenville, Texas | Active |
| Mercer | 2005 | Mercer University | Macon, Georgia | Active |
| Missouri–St. Louis | 2006 | University of Missouri–St. Louis | St. Louis, Missouri | Active |
| California, Merced | 2007 | University of California, Merced | Merced, California | Active |
| Florida International | 2007 | Florida International University | University Park, Florida | Active |
| Providence College | 2008 | Providence College | Providence, Rhode Island | Active |
| Mount Saint Vincent | 2009 | University of Mount Saint Vincent | Riverdale, Bronx, New York | Active |
| Nordic | 2009 | Norway, Sweden, Finland, and Iceland | Espoo, Finland | Active |
| North Shore | 2009 | Salem, Wenham, and Beverly communities | Salem, Massachusetts | Active |
| Findlay | 2010 | University of Findlay | Findlay, Ohio | Active |
| Purdue Calumet | 2012 | Purdue University Northwest | Hammond, Indiana | Active |
| Radford | 2014 | Radford University | Radford, Virginia | Active |
| West Chester | April 12, 2016 | West Chester University | West Chester, Pennsylvania | Active |
| South Florida | 2018 | University of South Florida | Tampa, Florida | Active |
| Austin College | March 7, 2019 | Austin College | Sherman, Texas | Active |
| Nova Southeastern | September 19, 2019 | Nova Southeastern University | Fort Lauderdale, Florida | Active |
| Midwestern University | May 18, 2021 | Midwestern University | Glendale, Arizona | Active |
| Whitworth | May 2021 | Whitworth University | Spokane, Washington | Active |
| Elmezzi Graduate School | March 30, 2023 | Elmezzi Graduate School of Molecular Medicine | Manhasset, New York | Active |
| Air Force Dayton | | Wright-Patterson Air Force Base | Dayton, Ohio | Active |
| Albany | | Albany area | Albany, Oregon | Active |
| American University of Beirut | | American University of Beirut | Beirut, Lebanon | Active |
| Arkansas State | | Arkansas State University | State University, Arkansas | Active |
| Atlanta University Center | | Atlanta University Center | Atlanta, Georgia | Active |
| Bangkok | | Bangkok area | Bangkok, Thailand | Active |
| Baylor College of Dentistry | | Baylor College of Dentistry | Dallas, Texas | Inactive |
| Berry College | | Berry College | Mount Berry, Georgia | Active |
| Boeing North America | | Boeing | Seal Beach, California | Active |
| BP America | | BP America | New York | Active |
| Bridgeport | | University of Bridgeport | Bridgeport, Connecticut | Active |
| British Columbia | | University of British Columbia | Vancouver, British Columbia, Canada | Active |
| Bucknell | | Bucknell University | Lewisburg, Pennsylvania | Active |
| Butler-Indianapolis | | Butler University | Indianapolis, Indiana | Active |
| C. W. Post | | C. W. Post College | Brookville, New York | Inactive |
| Cal Poly | | California Polytechnic State University, San Luis Obispo | San Luis Obispo, California | Active |
| Cal Poly Pomona | | California State Polytechnic University, Pomona | Pomona, California | Active |
| California State Bakersfield | | California State University, Bakersfield | Bakersfield, California | Active |
| California State Chico | | California State University, Chico | Chico, California | Active |
| California State Dominguez Hills | | California State University, Dominguez Hills | Carson, California | Active |
| California Santa Cruz | | University of California, Santa Cruz | Santa Cruz, California | Active |
| California State Fresno | | California State University, Fresno | Fresno, California | Inactive |
| California State Hayward | | California State University, Hayward | Hayward, California | Inactive |
| California State Long Beach | | California State University, Long Beach | Long Beach, California | Active |
| California State Sacramento | | California State University, Sacramento | Sacramento, California | Active |
| California State San Bernardino | | California State University, San Bernardino | San Bernardino, California | Active |
| Calspan | | Calspan | Buffalo, New York | Active |
| Center for Naval Analyses | | Center for Naval Analyses | Alexandria, Virginia | Active |
| Central Michigan | | Central Michigan University | Mount Pleasant, Michigan | Active |
| Central Missouri | | University of Central Missouri | Warrensburg, Missouri | Inactive |
| Central Savannah River Area | | Central Savannah River Area | Aiken, South Carolina | Active |
| Central Texas Research Society | | Central Texas Research Society | Temple, Texas | Inactive |
| China Lake | | Naval Air Weapons Station China Lake | Ridgecrest, California | Active |
| CINVESTAV | | CINVESTAV | Mexico City, Mexico | Active |
| City College of New York | | City College of New York | New York City, New York | Active |
| Clear Lake | | Clear Lake | Houston, Texas | Active |
| College of the Holy Cross | | College of the Holy Cross | Worcester, Massachusetts | Inactive |
| Colorado State University Pueblo | | Colorado State University Pueblo | Pueblo, Colorado | Inactive |
| Corning | | Corning Incorporated | Corning, New York | Active |
| David W. Taylor | | Carderock Division of the Naval Surface Warfare Center | Bethesda, Maryland | Active |
| Depauw-Wabash | | Depauw University and Wabash College | Crawfordsville, Indiana | Active |
| DOE/NRC | | United States Department of Energy and Nuclear Regulatory Commission | Rockville, Maryland | Active |
| Dubuque | | University of Dubuque | Dubuque, Iowa | Inactive |
| DuPont | | DuPont Experimental Station | Wilmington, Delaware | Active |
| Duquesne | | Duquesne University | Pittsburgh, Pennsylvania | Inactive |
| Eastern Michigan | | Eastern Michigan University | Ypsilanti, Michigan | Active |
| Eastern Oregon University | | Eastern Oregon University | La Grande, Oregon | Inactive |
| Emporia State | | Emporia State University | Emporia, Kansas | Inactive |
| Ferris State | | Ferris State University | Big Rapids, Michigan | Inactive |
| Florida A&M | | Florida A&M University | Tallahassee, Florida | Active |
| Florida Atlantic | | Florida Atlantic University | Boca Raton, Florida | Active |
| Florida Institute of Technology | | Florida Institute of Technology | Melbourne, Florida | Inactive |
| Ford Motor Company | | Ford Motor Company | Dearborn, Michigan | Active |
| Fort Hays | | Fort Hays State University | Hays, Kansas | Active |
| Four Corners | | Multi-campus collegiate | Durango, Colorado | Active |
| Georgia Southern | | Georgia Southern University | Statesboro, Georgia | Active |
| Grand Valley | | Grand Valley State University | Allendale, Michigan | Active |
| Greater Des Moines | | Greater Des Moines | Des Moines, Iowa | Active |
| GTE Laboratories | | GTE Laboratories | Waltham, Massachusetts | Inactive |
| Gulf Coast | | Gulf Coast | Stennis Space Center, Mississippi | Active |
| Hartford | | Hartford area | Hartford, Connecticut | Active |
| Hollins | | Hollins University | Roanoke, Virginia | Active |
| Hope College | | Hope College | Holland, Michigan | Active |
| Hughes Laboratories | | Hughes Research Laboratories | Malibu, California | Inactive |
| Humboldt State University | | Humboldt State University | Arcata, California | Inactive |
| Hungarian | | Hungary nationwide | Budapest, Hungary | Active |
| Huntsville | 19xx ?–19xx ? | University of Alabama in Huntsville | Huntsville, Alabama | Inactive |
| Iberian | | Iberian Peninsula | Spain | Active |
| Johnson & Johnson | | Johnson & Johnson | Spring House, Pennsylvania | Active |
| Kalamazoo | | Kalamazoo area | Kalamazoo, Michigan | Active |
| Kennesaw State | | Kennesaw State University | Kennesaw, Georgia | Inactive |
| Kirksville | | Kirksville area | Kirksville, Missouri | Active |
| Lafayette | | Lafayette College | Easton, Pennsylvania | Active |
| Lake Forest | | Lake Forest College | Lake Forest, Illinois | Inactive |
| LLNL | | Lawrence Livermore National Laboratory | Livermore, California | Active |
| Lynchburg | | University of Lynchburg | Lynchburg, Virginia | Inactive |
| M. W. Kellogg | | M.W. Kellogg | Houston, Texas | Inactive |
| Magic Valley | | Magic Valley area | Kimberly, Idaho | Active |
| Mesa State College | | Colorado Mesa University | Grand Junction, Colorado | Inactive |
| McDaniel | | McDaniel College | Westminster, Maryland | Inactive |
| McMaster | | McMaster University | Hamilton, Ontario, Canada | Active |
| Memphis | | University of Memphis | Memphis, Tennessee | Active |
| Minnesota Duluth | | University of Minnesota Duluth | Duluth, Minnesota | Active |
| Minot State | | Minot State University | Minot, North Dakota | Active |
| Missouri State | | Missouri State University | Springfield, Missouri | Active |
| Monterrey Institute | | Monterrey Institute of Technology and Higher Education | Monterrey, Nuevo Leon, Mexico | Active |
| Mount Sinai | | Mount Sinai School of Medicine | New York City, New York | Inactive |
| Muskingum | | Muskingum University | New Concord, Ohio | Active |
| Nalco Chemical | | Nalco Chemical Company | Naperville, Illinois | Active |
| Naval Air Warfare Center Training Systems | | Naval Air Warfare Center Training Systems Division | Orlando, Florida | Active |
| New Mexico Tech | | New Mexico Institute of Mining and Technology | Socorro, New Mexico | Active |
| New Zealand | | New Zealand countrywide | Wellington, New Zealand | Active |
| North Carolina Central | | North Carolina Central University | Durham, North Carolina | Active |
| North Texas | | University of North Texas | Denton, Texas | Inactive |
| Northeastern State | | Northeastern State University | Tahlequah, Oklahoma | Inactive |
| Northern Colorado | | University of Northern Colorado | Greeley, Colorado | Inactive |
| Northern Iowa | | University of Northern Iowa | Cedar Falls, Iowa | Active |
| Northern Kentucky | | Northern Kentucky University | Highland Heights, Kentucky | Inactive |
| Northern Westchester | | Northern Westchester area | Westchester County, New York | Active |
| Northwest Indiana | | Northwest Indiana | Gary, Indiana | Active |
| Northwestern State | | Northwestern State University | Natchitoches, Louisiana | Inactive |
| Olin | | Olin Corporation | Cheshire, Connecticut | Active |
| Oneonta | | Oneonta area | Oneonta, New York | Active |
| Panama City | | Panama City area | Panama City, Florida | Active |
| Peoria | | Peoria area | Peoria, Illinois | Active |
| Picatinny | | Picatinny Arsenal | Mendham Borough, New Jersey | Active |
| Prague Institute of Advanced Studies | | Prague Institute of Advanced Studies | Prague, Czech Republic | Active |
| Prairie View | | Prairie View A&M University | Prairie View, Texas | Active |
| Regis College | | Regis College | Weston, Massachusetts | Inactive |
| Richmond | | University of Richmond | Richmond, Virginia | Inactive |
| Roanoke College | | Roanoke College | Salem, Virginia | Inactive |
| Roche Research | | Roche Research | Nutley, New Jersey | Active |
| Rosalind Franklin | | Rosalind Franklin University of Medicine and Science | North Chicago, Illinois | Inactive |
| Saint Bonaventure | | St. Bonaventure University | St. Bonaventure, New York | Inactive |
| St. Cloud State | | St. Cloud State University | St. Cloud, Minnesota | Active |
| Saint Mary's College of California | | Saint Mary's College of California | Moraga, California | Active |
| Sam Houston State | | Sam Houston State University | Huntsville, Texas | Active |
| San Joaquin Valley | | San Joaquin Valley | Stockton, California | Active |
| San Jose State | | San Jose State University | San Jose, California | Active |
| Sangamon State | | Sangamon State University | Springfield, Illinois | Inactive |
| Savannah | | Savannah area | Savannah, Georgia | Active |
| Seton Hall | | Seton Hall University | South Orange, New Jersey | Active |
| Shreveport | | Shreveport area | Shreveport, Louisiana | Active |
| Sigma Xi Georgia | | Georgia nationwide | Tbilisi, Georgia | Active |
| Sigma Xi Moscow | | Moscow area | Moscow, Russia | Active |
| Sigma Xi Romania | | Romania nationwide | Bucharest, Romania | Active |
| Slippery Rock | | Slippery Rock University | Slippery Rock, Pennsylvania | Active |
| Southcentral Pennsylvania | | South Central Pennsylvania | Waynesboro, Pennsylvania | Active |
| Southeast Missouri State | | Southeast Missouri State University | Cape Girardeau, Missouri | Inactive |
| Southern Appalachian | | Southern Appalachian area | Johnson City, Tennessee | Active |
| Southern Indiana | | Southern Indiana | Evansville, Indiana | Active |
| Southern University | | Southern University | Baton Rouge, Louisiana | Inactive |
| State University College at Buffalo | | State University College at Buffalo | Buffalo, New York | Inactive |
| State University College at New Paltz | | State University College at New Paltz | New Paltz, New York | Inactive |
| Stephen F. Austin | | Stephen F. Austin State University | Nacogdoches, Texas | Inactive |
| SUNY Brockport | | State University College at Brockport | Brockport, New York | Inactive |
| SUNY Cortland | | State University of New York at Cortland | Cortland, New York | Active |
| Tampa Bay | | Tampa Bay area | Tampa, Florida | Active |
| Tennessee A&I Fisk-Meharry | | Tennessee State University, Fisk University, and Meharry Medical College | Nashville, Tennessee | Active |
| Texas A&M– Commerce | | Texas A&M University–Commerce | Commerce, Texas | Inactive |
| Texas Rio Grande Valley | | University of Texas Rio Grande Valley | Brownsville, Texas | Inactive |
| Towson | | Towson University | Baltimore, Maryland | Active |
| Tri-State | | Tri-State University | Angola, Indiana | Inactive |
| UL Lafayette | | University of Louisiana at Lafayette | Lafayette, Louisiana | Inactive |
| UL Monroe | | University of Louisiana at Monroe | Monroe, Louisiana | Inactive |
| UNAM | | National Autonomous University of Mexico | Mexico City, Mexico | Active |
| University of Connecticut Health Center | | UConn Health | Farmington, Connecticut | Inactive |
| University of Illinois | | University of Illinois Urbana-Champaign | Champaign, Illinois | Inactive |
| University of Illinois Chicago | | University of Illinois Chicago | Chicago, Illinois | Inactive |
| University of the South | | University of the South | Sewanee, Tennessee | Inactive |
| UNLV | | University of Nevada, Las Vegas | Las Vegas, Nevada | Active |
| USciences | | University of the Sciences | Philadelphia, Pennsylvania | Inactive |
| UT Health Science Center | | University of Tennessee Health Science Center | Memphis, Tennessee | Active |
| Ventura County | | Ventura County | Ventura, California | Active |
| Virginia State | | Virginia State University | Petersburg, Virginia | Inactive |
| Wabash Valley | | Wabash Valley area | Terre Haute, Indiana | Active |
| Waterways Experiment Station | | Waterways Experiment Station | Vicksburg, Mississippi | Active |
| Westchester | | Westchester County | New York | Active |
| Western Illinois | | Western Illinois University | Macomb, Illinois | Inactive |
| Western Pennsylvania | | Western Pennsylvania | Pennsylvania | Active |
| Western Washington | | Western Washington University | Bellingham, Washington | Active |
| Wilkes | | Wilkes University | Wilkes-Barre, Pennsylvania | Inactive |
| William Paterson | | William Paterson University | Wayne, New Jersey | Inactive |
| Wisconsin-Eau Claire/Stout | | University of Wisconsin–Eau Claire and University of Wisconsin–Stout | Eau Claire, Wisconsin | Inactive |
| Wisconsin-Green Bay | | University of Wisconsin–Green Bay | Green Bay, Wisconsin | Active |
| Wisconsin-Stevens Point | | University of Wisconsin–Stevens Point | Stevens Point, Wisconsin | Inactive |
| Wittenberg | | Wittenberg University | Springfield, Ohio | Inactive |
| WSU Vancouver | | Washington State University Vancouver | Vancouver, Washington | Inactive |
| Wooster | | Wooster area | Wooster, Ohio | Active |