# List of Sigma Tau chapters

Sigma Tau was an engineering honor society. In 1974, it merged with Tau Beta Pi, the oldest engineering honor society and the second oldest collegiate honor society in the United States. As part of the merger, Tau Beta Pi absorbed twelve Sigma Tau chapters into its existing chapters located on the same campuses. Tau Beta Pi re-chartered 22 Sigma Tau chapters at campuses where it did not exist.
In the following chapter list, inactive chapters and institutions are indicated in italics.
| Chapter | Charter date and range | Institution | Location | Status |
| Alpha | February 22, 1904 – January 1, 1974 | University of Nebraska–Lincoln | Lincoln, Nebraska | Merged (ΤΒΠ) |
| Beta | November 16, 1907 – March 26, 1912 | University of Iowa | Iowa City, Iowa | Inactive |
| Gamma | February 22, 1911 – January 1, 1974 | University of Pennsylvania | Philadelphia, Pennsylvania | Merged (ΤΒΠ) |
| Delta (First) | April 12, 1912 – April 22, 1916 | University of South Dakota | Vermillion, South Dakota | Inactive, Reissued |
| Delta (Second) | May 17, 1941 – January 1, 1974 | South Dakota State University | Brookings, South Dakota | Merged (ΤΒΠ) |
| Epsilon | May 16, 1912 – January 1, 1974 | Kansas State University | Manhattan, Kansas | Merged (ΤΒΠ) |
| Zeta | April 23, 1913 – January 1, 1974 | Oregon State University | Corvallis, Oregon | Merged (ΤΒΠ) |
| Eta | May 16, 1913 – January 1, 1974 | Washington State University | Pullman, Washington | Merged (ΤΒΠ) |
| Theta | February 27, 1914 – before 1974 | University of Illinois Urbana-Champaign | Urbana, Illinois | Inactive |
| Iota | June 1, 1914 – January 1, 1974 | University of Colorado Boulder | Boulder, Colorado | Merged (ΤΒΠ) |
| Kappa | May 1, 1915 – January 1, 1974 | Pennsylvania State University | State College, Pennsylvania | Merged (ΤΒΠ) |
| Lambda | May 22, 1915 – January 1, 1974 | University of Kansas | Lawrence, Kansas | Merged (ΤΒΠ) |
| Mu | May 13, 1916 – January 1, 1974 | University of Oklahoma | Norman, Oklahoma | Merged (ΤΒΠ) |
| Nu | October 20, 1916 – January 1, 1974 | Swarthmore College | Swarthmore, Pennsylvania | Merged (ΤΒΠ) |
| Xi | April 8, 1921 – January 1, 1974 | George Washington University | Washington, D.C. | Merged (ΤΒΠ) |
| Omicron | December 21, 1935 – January 1, 1974 | University of Louisville | Louisville, Kentucky | Merged (ΤΒΠ) |
| Pi | April 8, 1922 – January 1, 1974 | University of North Dakota | Grand Forks, North Dakota | Merged (ΤΒΠ) |
| Rho | May 22, 1922 – January 1, 1974 | University of Idaho | Moscow, Idaho | Merged (ΤΒΠ) |
| Sigma | April 16, 1923 – January 1, 1974 | Oklahoma State University | Stillwater, Oklahoma | Merged (ΤΒΠ) |
| Tau | April 26, 1923 – January 1, 1974 | South Dakota School of Mines and Technology | Rapid City, South Dakota | Merged (ΤΒΠ) |
| Upsilon | December 3, 1923 – January 1, 1974 | University of Florida | Gainesville, FL | Merged (ΤΒΠ) |
| Phi | December 13, 1924 – January 1, 1974 | University of Akron | Akron, OH | Merged (ΤΒΠ) |
| Chi | December 22, 1928 – January 1, 1974 | University of New Mexico | Albuquerque, NM | Merged (ΤΒΠ) |
| Psi | May 31, 1930 – January 1, 1974 | University of Pittsburgh | Pittsburgh, PA | Merged (ΤΒΠ) |
| Omega | January 13, 1932 – January 1, 1974 | University of Wyoming | Laramie, WY | Merged (ΤΒΠ) |
| Alpha Alpha | May 14, 1936 – January 1, 1974 | Colorado State University | Fort Collins, CO | Merged (ΤΒΠ) |
| Alpha Beta | October 17, 1942 – January 1, 1974 | Southern Methodist University | Dallas, TX | Merged (ΤΒΠ) |
| Alpha Gamma | May 22, 1949 – January 1, 1974 | New Mexico State University | Las Cruces, NM | Merged (ΤΒΠ) |
| Alpha Delta | February 10, 1951 – January 1, 1974 | Utah State University | Logan, UT | Merged (ΤΒΠ) |
| Alpha Epsilon | May 22, 1952 – January 1, 1974 | University of Nevada, Reno | Reno, NV | Merged (ΤΒΠ) |
| Alpha Zeta | May 20, 1953 – January 1, 1974 | Rice University | Houston, TX | Merged (ΤΒΠ) |
| Alpha Eta | April 22, 1956 – January 1, 1974 | Texas A&I University | Kingsville, TX | Merged (ΤΒΠ) |
| Alpha Theta | April 23, 1956 – January 1, 1974 | Youngstown State University | Youngstown, OH | Merged (ΤΒΠ) |
| Alpha Iota | February 1, 1958 – January 1, 1974 | Bradley University | Peoria, IL | Merged (ΤΒΠ) |
| Alpha Kappa | April 19, 1966 – January 1, 1974 | Fresno State University | Fresno, CA | Merged (ΤΒΠ) |
| Alpha Lambda | December 10, 1971 – January 1, 1974 | Prairie View A&M University | Prairie View, TX | Merged (ΤΒΠ) |
| Alpha Mu | November 17, 1973 – January 1, 1974 | Christian Brothers College | Memphis, TN | Merged (ΤΒΠ) |
| Omega Alpha | November 12, 1954 – January 1, 1974 | General Chapter | n/a | Inactive |