Phi Delta Theta
- Nickname: Phi Delt
- MT Alpha Chapter Founding Date: March 4, 1921
- Colors: Azure and Argent
- Symbol: Owl
- Philanthropy: ALS Association
- Motto: "One Man is No Man"
- Contact Chapter President: phideltatheta@umontana.edu
- National Website:
Sigma Alpha Epsilon
- Nickname: SAE
- UM Founding Date: February 12, 1927
- Colors: Purple and Gold
- Symbol: Phoenix
- Philanthropy: Boy's and Girl's Club, Children's Miracle Network
- Values: Expressed in "The True Gentleman" by John Walter Wayland
- Address: 1120 Gerald Avenue
- Contact Chapter President: sigmaalphaepsilon@umontana.edu
- National Website:
Sigma Chi
- Nickname: Sigma Chi
- Beta Delta Chapter Founding Date: September 11, 1906
- Colors: Old Gold and Blue
- Symbol: The White Cross
- Philanthropy: Huntsman Cancer Institute
- Values: Friendship, Justice, and Learning
- Address: 1110 Gerald Avenue
- Contact Chapter President: sigmachi@umontana.edu
- National Website:
Sigma Nu
- Nickname: Snu
- Gamma Phi Chapter Founding Date: February 3, 1905
- Colors: Black, Gold, White
- Symbol: Snake
- Philanthropy: Boy's and Girl's Club, Great Strides Walk
- Values: Love, Truth, Honor
- Address: 1006 Gerald Avenue
- Contact Chapter President: sigmanu@umontana.edu
- National Website:
