The following honor societies have chapters at Knox College

Alpha Psi Omega — Theatre
Eta Sigma Phi — Classics
Mortar Board — Academic and Service
Phi Beta Kappa — Academic Achievement
Pi Kappa Lambda — Music
Pi Sigma Alpha — Political Science
Psi Chi — Psychology
Sigma Alpha Iota — Music
Sigma Delta Pi — Spanish
Sigma Pi Sigma — Physics
Sigma Xi — Science Research