Nearly a third of sitting US senators belong to fraternities or sororities. See the full list.

Sen. Ashley Moody (R-FL), Mitch McConnell (R-KY), and Roger Marshall (R-KS) are three of the US senators with ties to Greek life sororities and fraternities. Bill Clark/CQ-Roll Call, Inc via Getty Images/Pete Kiehart/Bloomberg via Getty Images/Michael M. Santiago/Getty Images Beyond party affiliation, there are some lesser-known loyalties tied to lawmakers in Washington, DC.Greek life fraternities and sororities, which often dominate social life in colleges and universities across the US, also have some of the strongest footprints in the Capitol.In the 119th Congress, just under a third of US senators are affiliated with a Greek organization, according to the Fraternity and Sorority Political Action Committee, which aims to "help more Greek alumnae get elected to the House or Senate for the first time."In years with congressional races throughout the country, the political action committee — often nicknamed the "Frat PAC" — can play a significant financial role. In the 2023-24 election cycle, the PAC raised over $900,000. Today, it has raised over $650,000 for the 2025-26 cycle, toward a $1 million goal.While funding goes toward the campaigns of Greek-life alumns, the committee does not align with one party over the other. FSPAC said that in the 2023-24 cycle, 52% of funds went to Republican candidates and 48% to Democratic candidates out of the 97 congressional campaigns it donated to.Beyond nationally organized fundraising, Greek life organizations also offer their lifelong members access to a network of powerful connections in the Capitol and beyond.See the 32 Greek-life-affiliated senators sitting in Congress, as listed by FSPAC. Jim Banks Sen. Jim Banks (R-IN) is listed as a member of the Delta Chi fraternity. Eric Lee/Getty Images State: IndianaParty: RepublicanOrganization: Delta Chi John Barrasso Sen. John Barrasso (R-WY) is listed as a member of the Phi Kappa Tau fraternity. Alex Wong/Getty Images State: WyomingParty: RepublicanOrganization: Phi Kappa Tau Michael Bennet Sen. Michael Bennet (D-CO) is listed as a member of the Beta Theta Pi fraternity. Bloomberg/Getty Images State: ColoradoParty: DemocraticOrganization: Beta Theta Pi Marsha Blackburn Sen. Marsha Blackburn (R-TN) is listed as a member of the Chi Omega sorority. Roberto Schmidt/Getty Images State: TennesseeParty: RepublicanOrganization: Chi Omega Lisa Blunt Rochester Sen. Lisa Blunt Rochester (D-DE) is listed as a member of the Alpha Kappa Alpha sorority. Tom Williams/CQ-Roll Call, Inc via Getty Images State: DelawareParty: DemocraticOrganization: Alpha Kappa Alpha Katie Britt Sen. Katie Britt (R-AL) is listed as a member of the Chi Omega sorority. Eric Lee/Getty Images State: AlabamaParty: RepublicanOrganization: Chi Omega Shelley Moore Capito Sen. Shelley Moore Capito (R-WV) is listed as a member of the Kappa Kappa Gamma sorority. Tom Williams/CQ-Roll Call, Inc via Getty Images State: West VirginiaParty: RepublicanOrganization: Kappa Kappa Gamma Chris Coons Sen. Chris Coons (D-DE) is listed as a member of the Delta Kappa Epsilon fraternity. Eric Lee/Getty Images State: DelawareParty: DemocraticOrganization: Delta Kappa Epsilon John Cornyn Sen. John Cornyn (R-TX) is a member of a local Chi Delta Tau fraternity. Tom Williams/CQ-Roll Call, Inc via Getty Images State: TexasParty: RepublicanOrganization: Local (non-national) Chi Delta Tau chapter at Trinity College Steve Daines Sen. Steve Daines (R-MT) is listed as a member of the Sigma Nu fraternity. Eric Lee/Bloomberg via Getty Images State: MontanaParty: RepublicanOrganization: Sigma Nu Deb Fischer Sen. Deb Fischer (R-NE) is listed as a member of the Gamma Phi Beta sorority. Tom Williams/CQ-Roll Call, Inc via Getty Images State: NebraskaParty: RepublicanOrganization: Gamma Phi Beta Ruben Gallego Sen. Ruben Gallego (D-AZ) is listed as a member of the Sigma Chi fraternity. Finn Gomez/Getty Images State: ArizonaParty: DemocraticOrganization: Sigma Chi Kirsten Gillibrand Sen. Kirsten Gillibrand (D-NY) is listed as a member of the Kappa Kappa Gamma sorority. Nathan Posner/Anadolu via Getty Images State: New YorkParty: DemocraticOrganization: Kappa Kappa Gamma Chuck Grassley Sen. Chuck Grassley (R-IA) is listed as a member of the Alpha Gamma Rho fraternity. Finn Gomez/Getty Images State: IowaParty: RepublicanOrganization: Alpha Gamma Rho Bill Hagerty Sen. Bill Hagerty (R-TN) is listed as a member of the Sigma Alpha Epsilon fraternity. Eric Lee/Getty Images State: TennesseeParty: RepublicanOrganization: Sigma Alpha Epsilon John Hoeven Sen. John Hoeven (R-ND) is a member of a local Alpha Chi Alpha fraternity. Tom Williams/CQ-Roll Call, Inc via Getty Images State: North DakotaParty: RepublicanOrganization: Local (non-national) Alpha Chi Alpha fraternity at Dartmouth College John Kennedy Sen. John Kennedy (R-LA) is listed as a member of the Sigma Nu fraternity. Aaron Schwartz/Bloomberg via Getty Images State: LouisianaParty: RepublicanOrganization: Sigma Nu Angus King Sen. Angus King (I-ME) is listed as a member of the Delta Upsilon fraternity. Bill Clark/CQ-Roll Call, Inc via Getty Images State: MaineParty: IndependentOrganization: Delta Upsilon Roger Marshall Sen. Roger Marshall (R-KS) is listed as a member of the Beta Theta Pi fraternity. Michael M. Santiago/Getty Images State: KansasParty: RepublicanOrganization: Beta Theta Pi Mitch McConnell Sen. Mitch McConnell (R-KY) is listed as a member of the Phi Kappa Tau fraternity. Pete Kiehart/Bloomberg via Getty Images State: KentuckyParty: RepublicanOrganization: Phi Kappa Tau Ashley Moody Sen. Ashley Moody (R-FL) is listed as a member of the Alpha Delta Pi sorority. Tom Williams/CQ-Roll Call, Inc via Getty Images State: FloridaParty: RepublicanOrganization: Alpha Delta Pi Jerry Moran Sen. Jerry Moran (R-KS) is listed as a member of the Alpha Tau Omega fraternity. Bill Clark/CQ-Roll Call, Inc via Getty Images State: KansasParty: RepublicanOrganization: Alpha Tau Omega Lisa Murkowski Sen. Lisa Murkowski (R-AK) is listed as a member of the Pi Beta Phi sorority. Daniel Heuer/Bloomberg via Getty Images State: AlaskaParty: RepublicanOrganization: Pi Beta Phi Alex Padilla Sen. Alex Padilla (D-CA) is listed as a member of the Zeta Psi fraternity. Eric Lee/Getty Images State: CaliforniaParty: DemocraticOrganization: Zeta Psi Gary Peters Sen. Gary Peters (D-MI) is a member of a local Zeta Sigma fraternity. Finn Gomez/Getty Images State: MichiganParty: DemocraticOrganization: Local (non-national) Zeta Sigma fraternity at Alma College. Jim Risch Sen. Jim Risch (R-ID) is listed as a member of the Phi Delta Theta fraternity. Tom Williams/CQ-Roll Call, Inc via Getty Images State: IdahoParty: RepublicanOrganization: Phi Delta Theta Brian Schatz Sen. Brian Schatz (D-HI) is a member of a local Phi Delta fraternity. Bill Clark/CQ-Roll Call, Inc via Getty Images State: HawaiiParty: DemocraticOrganization: Local (non-national) Phi Delta fraternity at Pomona College Eric Schmitt Sen. Eric Schmitt (R-MO) is listed as a member of the Alpha Kappa Lambda fraternity. Chip Somodevilla/Getty Images State: MissouriParty: RepublicanOrganization: Alpha Kappa Lambda Dan Sullivan Sen. Dan Sullivan (R-AK) is listed as a member of a private club fraternity. Andrew Harnik/Getty Images State: AlaskaParty: RepublicanOrganization: Private club Raphael Warnock Sen. Raphael Warnock (D-GA) is listed as a member of the Alpha Phi Alpha fraternity. Eric Lee/Bloomberg via Getty Images State: GeorgiaParty: DemocraticOrganization: Alpha Phi Alpha Elizabeth Warren Sen. Elizabeth Warren (D-MA) is listed as a member of the Kappa Alpha Theta sorority. Daniel Heuer/Bloomberg via Getty Images State: MassachusettsParty: DemocraticOrganization: Kappa Alpha Theta Roger Wicker Sen. Roger Wicker (R-MS) is listed as a member of the Sigma Nu fraternity. Wojtek RADWANSKI / AFP via Getty Images State: MississippiParty: RepublicanOrganization: Sigma Nu Read next Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Kristine Villarroel is a reporter on Business Insider's Editorial Partnerships team.Her reporting often turns data into accessible stories about how money, education, policy, and place shape Americans’ lives. She covers stories on college costs and degree outcomes, state-by-state comparisons, public officials’ salaries, the rising cost of living, travel, food, and real estate.She has previously worked writing about culture, entertainment, music, and tech. Her work has been featured on Teen Vogue and Wired. She graduated from the University of Florida with a degree in journalism. There, she worked as editor of The Independent Florida Alligator. Email Villarroel at kvillarroel@insider.com and follow her on X @ktnedelvalle Congress College