In addition to the fraternities and sororities recognized by the Center for Fraternity and Sorority Development, there are many other Greek-lettered organizations at the University of Connecticut. Members of social fraternities and sororities may also be eligible to join the following registered student organizations:
| Academic & Professional Greek-Lettered Organizations |
| Organization | Specialization |
| Alpha Beta Epsilon | Biology |
| Alpha Kappa Psi | Business |
| Alpha Zeta Omega | Pharmacy |
| Beta Alpha Psi | Finance |
| Delta Sigma Pi | Business |
| Gamma Iota Sigma | Actuarial Science |
| Kappa Kappa Psi | Music: Band |
| Kappa Psi | Pharmacy |
| Lambda Kappa Sigma | Pharmacy (Women) |
| Phi Delta Chi | Pharmacy |
| Phi Lambda Sigma | Pharmacy |
| Sigma Theta Alpha | Medicine & Healthcare |
| Tau Beta Sigma | Music: Band |
| Honorary Greek-Lettered Organization |
| Organization | Specialization |
| Alpha Eta Mu Beta | Bio-medical Engineering |
| Alpha Lambda Delta | Pharmacy |
| Alpha Zeta | Freshman Scholars |
| Chi Epsilon | Civil Engineering |
| Delta Alpha Pi | Students with Disabilities |
| Eta Kappa Nu | Electrical & Electronic Engineering |
| Lambda Alpha | Anthropology |
| Omega Chi Epsilon | Chemical Engineering |
| Pi Sigma Alpha | Political Science |
| Pi Tau Sigma | Mechanical Engineering |
| Psi Chi | Psychology |
| Rho Chi | Pharmacy |
| Tau Beta Pi | Engineering |
| Upsilon Pi Epsilon | Computer & Information Sciences |
| Special Interest Greek-Lettered Organizations |
| Organization | Specialization |
| Alpha Phi Omega | Service |
| Gamma Sigma Sigma | Service (Women) |
| Kappa Beta Gamma | Special Interest (Women) |
| Lambda Lambda Lambda | Pop Culture |
| Phi Sigma Pi | Honors |
| Sigma Alpha Lambda | Leadership & Honors |