| Chapter | Charter date | Institution | Location | Status | Reference |
|---|
| Hook | 1922–before 2007 | University of Washington | Seattle, Washington | Inactive | [a] |
| Ball and Chain | 1922–c. 1983 | University of Idaho | Moscow, Idaho | Inactive | [5] [6] [b] |
| Fang | 1922–c. 1981 | Montana State University | Bozeman, Montana | Inactive | [7] [8] [c] |
| Cougar Guard | 1922–c. 1985 | Washington State University | Pullman, Washington | Inactive | [9] [10] [d] |
| Bear Paw | 1922–c. 1961 | University of Montana | Missoula, Montana | Inactive | |
| Oregon Knights | 1922–before 2007 | University of Oregon | Eugene, Oregon | Inactive | [11] [e] |
| Beaver Knights / Thane | 1923–before 2007 | Oregon State University | Corvallis, Oregon | Inactive | [12] |
| Beno | 1924–before 2007 | Utah State University | Logan, Utah | Inactive | [f] |
| Yeoman | 1925–before 2007 | University of Redlands | Redlands, California | Inactive | |
| Trojan Knights | 1925–before 2007 | University of Southern California | Los Angeles, California | Inactive | |
| Pioneer Lancer | 1932–before 2007 | Lewis–Clark State College | Lewiston, Idaho | Inactive | |
| Tiger | 1932–before 2007 | Idaho State University | Pocatello, Idaho | Inactive | [13] [g] |
| Arrowrock | 1935–after 2007 | College of Idaho | Caldwell, Idaho | Inactive | |
| Tomahawk | 1935–before 2007 | Eastern Washington University | Cheney, Washington | Inactive | [14] [h] |
| Kennel | 1936–before 2007 | Gonzaga University | Spokane, Washington | Inactive | [15] [i] |
| Claw | 1937–before 2007 | Central Washington University | Ellensburg, Washington | Inactive | [16] [j] |
| Copper Guard | 1937–before 2007 | Montana School of Mines | Butte, Montana | Inactive | [k] |
| Scalper / Red Templar | 1937–before 2007 | University of Utah | Salt Lake City, Utah | Inactive | [17] [l] |
| Old Oak | 1939–before 2007 | Linfield University | McMinnville, Oregon | Inactive | |
| Cardinal | 1940–1951 ? | Albion State Normal School | Albion, Idaho | Inactive | [m] |
| Golden Plume | 1940–1995 | Boise State University | Boise, Idaho | Inactive | [18] [19] [n] |
| Wigwam | 1940–before 2007 | Seattle University | Seattle, Washington | Inactive | [20] [o] |
| Gold Y | 1941–before 2007 | Brigham Young University | Provo, Utah | Inactive | [21] [22] [23] [p] |
| Log | 1946–before 2007 | University of Puget Sound | Tacoma, Washington | Inactive | [24] |
| Badger | 1947–before 2007 | Pacific University | Forest Grove, Oregon | Inactive | [25] [26] [q] |
| Lookout | 1948–before 2007 | Whitworth University | Spokane, Washington | Inactive | [27] [28] [r] |
| Norseman Knights / Silver Chalice / Viking | 1948–before 2007 | Brigham Young University–Idaho | Rexburg, Idaho | Inactive | [29] [30] [s] |
| Pilots | 1948–before 2007 | University of Portland | Portland, Oregon | Inactive | |
| Mustang | 1949–before 2007 | Lewis & Clark College | Portland, Oregon | Inactive | |
| Rainbow | 1949–before 2007 | Southern Utah University | Cedar City, Utah | Inactive | [t] |
| Rimrock Knights | 1949–before 2007 | Rocky Mountain College | Billings, Montana | Inactive | [31] |
| Yurok | 1949–before 2007 | Humboldt State University | Arcata, California | Inactive | [32] [33] [u] |
| Stinger / Avalon | 1950–before 2007 | Montana State University Billings | Billings, Montana | Inactive | [34] [35] |
| Gold Nugget (see Thor) | 1951–October 1962 | University of Denver | Denver, Colorado | Consolidated | [36] [4] [v] |
| Los Caballeros | 1951–before 2007 | Westminster College | Salt Lake City, Utah | Inactive | [37] |
| Mountaineer | 1951–before 2007 | Eastern Oregon University | La Grande, Oregon | Inactive | [38] |
| Pioneer (see Thor) | 1951–October 1962 | University of Denver - Park Campus | Colorado | Consolidated | [36] |
| Cruiser | 1953–before 2007 | Olympic College | Bremerton, Washington | Inactive | |
| Harbor Knights | 1953–before 2007 | Grays Harbor College | Aberdeen, Washington | Inactive | |
| Los Matadores | 1953–before 2007 | New Mexico Highlands University | Las Vegas, New Mexico | Inactive | |
| Totem | 1953–before 2007 | Colorado State University | Fort Collins, Colorado | Inactive | [39] |
| Yeoman | 1953–before 2007 | Saint Martin's University | Lacey, Washington | Inactive | |
| Excalibur | 1954–before 2007 | Eastern Oklahoma State College | Wilburton, Oklahoma | Inactive | [40] |
| Camelot | 1959–before 2007 | University of Texas–Pan American | Edinburg, Texas | Inactive | [41] |
| Golden Eagle | 1959–before 2007 | Utah State University Eastern | Price, Utah | Inactive | [42] |
| Snow / White Knights | 1959–before 2007 | Snow College | Ephraim, Utah | Inactive | [43] |
| Odin's Raiders | 1960–before 2007 | Portland State University | Portland, Oregon | Inactive | [33] |
| Praetor | 1960–before 2007 | Northeastern Oklahoma A&M College | Miami, Oklahoma | Inactive | |
| Red Eagle | 1960–before 2007 | University of Nevada, Las Vegas | Paradise, Nevada | Inactive | [44] [w] |
| Wolf Knights | 1960–before 2007 | Western Oregon University | Monmouth, Oregon | Inactive | [45] |
| Lancelot | 1961–before 2007 | Connors State College | Muskogee, Oklahoma | Inactive | |
| Galahad | 1961–before 2007 | Oklahoma State University | Stillwater, Oklahoma | Inactive | [46] [39] |
| Buenaventura | 1961–before 2007 | Ventura College | Ventura, California | Inactive | [46] |
| Scout | 1961–before 2007 | University of San Diego | San Diego, California | Inactive | [46] |
| Royal Windsor | 1962–before 2007 | Fort Lewis College | Durango, Colorado | Inactive | [46] [47] |
| Kamehameha | 1962–before 2007 | Brigham Young University–Hawaii | Lāʻie, Hawaii | Inactive | [36] [x] |
| Thor | October 1962–before 2007 | University of Denver | Denver, Colorado | Inactive | [y] |
| Harbinger | 1963–before 2007 | Washburn University | Topeka, Kansas | Inactive | |
| Osage | 1963–before 2007 | Missouri University of Science and Technology | Rolla, Missouri | Active | [39] [48] [49] |
| Knight | 1964–before 2007 | Pacific Lutheran University | Parkland, Washington | Inactive | [50] |
| Golden Fleece | 1964–before 2007 | Yakima Valley College | Yakima, Washington | Inactive | |
| Crimson Tide | 1968–before 2007 | Western Montana College | Dillon, Montana | Inactive | [51] |
| Javelina | 1968–before 2007 | Texas A&M University–Kingsville | Kingsville, Texas | Inactive | |
| Falcon | 1969–before 200 | Columbia Basin College | Pasco, Washington | Inactive | |
| Don Quixote | 1976–before 2007 | University of Texas at Austin | Austin, Texas | Inactive | [52] |
| Tri-Star | 1988–before 2007 | University of Missouri | Columbia, Missouri | Inactive | |
| Silver Plume | 1990–before 2007 | Utah Valley State College | Orem, Utah | Inactive | |