Here is the list of Class of 1973 affinity groups and leaders as of December 2022. If you would like to be an leader for an affinity group not shown here, or if you just have a group of friends you’d like to reach out to, please contact Bill or Ron.
| Affinity Group | Number of Members | Affinity Group Leader |
| Acacia Fraternity | 12 | Mike Ciaraldi |
| Alpha Gamma Rho Fraternity | 21 | Michael Holloway |
| Alpha Phi | Kathy Ottobre, Sally Smith | |
| Alpha Phi Omega | Rick Saltz | |
| Alpha Sigma Phi Fraternity | 30 | Jack Lawlor |
| Balch Hall Residence | 68 | Lorraine Skalko, Thilde Peterson |
| Basketball Team | 15 | George Ragsdale |
| Big Red Band | 67 | Bill Welker |
| Black Alumni Association (CBAA) | 58 | Denise Meredith |
| Boldt Tower Residence | 11 | Ralph Behrsin, Chuck Fowler |
| Cayuga’s Waiters | 4 | Doug Jimerson |
| Chi Phi Fraternity | 13 | Vincent Variano |
| Continuous Reunion Club | 11 | Bill Welker |
| Cornell Ambassadors | Christina Sargent | |
| Cornell Catholic Community | 37 | Jacqui Bower |
| Cornell Cinema | 19 | Margie Smigel |
| Cornell Daily Sun | 59 | Amelia Katzen |
| Cornell Heavyweight Crew | 23 | Bob Rice |
| Cornell Lightweight Crew | 18 | Bob Rice |
| Cornell Society of Hotelmen | 97 | Marty Sherman, Ron Skalko |
| Cornell Winds | 43 | Bill Welker |
| Delta Chi Fraternity | 18 | Jeff Coffin |
| Delta Delta Delta Sorority | 19 | MJ Anderson |
| Delta Gamma Sorority | 17 | Marty Sherman |
| Delta Phi Epsilon Sorority | 9 | Pam Meyers |
| Delta Tau Delta Fraternity | 18 | David Kapelman |
| Delta Upsilon Fraternity | 18 | Mark Clemente |
| Episcopal Church at Cornell | 46 | Bill Welker |
| Football 150 | 16 | Mark Clemente |
| Football Varsity | 73 | Bob Douglas |
| Glee Club | 33 | Bill Chamberlain |
| Golf Team | 14 | Bob Palmquist |
| International Living Center Res | 40 | Chuck Fowler |
| ILR | 79 | Roger Jacobs, David Kapelman |
| Kappa Alpha Fraternity | 19 | Richard Schrafel |
| Kappa Delta Rho Fraternity | 15 | Larry Dunham |
| Kappa Kappa Gamma Sorority | 24 | Susan Robbins |
| Kappa Sigma Fraternity | 13 | Norman Lange, Charles Keibler |
| Lyon Hall Residence | 34 | David Kapelman |
| Mary Donlon Hall Residence | 212 | Phyllis Grummon (floor 2) |
| Navy ROTC | 13 | Fred Brunk |
| North Baker Hall Residence | 53 | John Caplan |
| Orchestra | 7 | Ruby Lee |
| Phi Gamma Delta Fraternity | 22 | John Brendel |
| Phi Sigma Epsilon Fraternity | 18 | Harold Trinkoff |
| Phi Sigma Kappa Fraternity | 12 | Fred Brunk |
| Pi Beta Phi Sorority | 25 | Susan Murphy |
| Pi Kappa Alpha Fraternity | 10 | Bob Kalb |
| Quill & Dagger | 42 | Bill Welker |
| Risley Hall Residence | 178 | Greenwald, Eliot |
| Sage Chapel Choir | 105 | Bill Welker |
| Seal & Serpent | 15 | David Lipson |
| Sigma Alpha Epsilon Fraternity | 18 | Ron Skalko |
| Sigma Delta Tau Sorority | 18 | Bonnie Wolfman Glasky |
| Sigma Nu Fraternity | 10 | Charles Wait |
| Sigma Phi Epsilon Fraternity | 13 | Ron Carman |
| Skiing Team | 11 | Jeff Coffin |
| South Baker Hall Residence | 49 | Bill Welker |
| Tau Epsilon Phi Fraternity | 21 | Herb Mendel |
| Theta Delta Chi Fraternity | 15 | Bill Bintzer |
| U-Hall 1 | 168 | Andrew Schatz (floor 3) |
| U-Hall 2 | 200 | Larry Dunham |
| U-Hall 3 | 193 | Bob Palmquist (floor 2) |
| University Senate | Eliot Greenwald | |
| Watermargin | 15 | Jessica Gurevitch |
| WVBR Cornell Radio Guild | 2 | Steve Jacobs |
| Zeta Beta Tau Fraternity | Eliot Greenwald | |
| Zeta Psi Fraternity | 12 | Dale Moulton |