10 Largest Sororities

Read about the largest sororities in the United States.

Photo: Thinkstock

Christopher Geno

The largest sororities aren’t always the best ones, but their members probably see it that way. Being a part of the largest sororities is often very rewarding for members because it’s an instant bond that can connect two women from across the world.

The oldest sorority on both lists is Delta Delta Delta, founded in 1888.

What is the largest sorority?

There are two main ways for ranking sororities by size. You can look at their overall membership or their number of chapters active on college campuses.

The largest sorority by membership is Chi Omega, also called “Chi O,” and the largest sorority by active chapters is Alpha Omicron Pi, or “A O Pi” for short. These sororities are all members of the National Panhellenic Conference. All together there are over four million college members and alumnae represented by the National Panhellenic Conference at over 620 colleges and universities.

10 Largest Sororities by Members

  1. Chi Omega: 300,000 members
  2. Kappa Alpha Theta: 250,000 members
  3. Delta Delta Delta: 238,000 members
  4. Kappa Kappa Gamma: 235,000 members
  5. Pi Beta Phi : 230,000 members
  6. (tie) Kappa Delta: 230,000 members
  7. Delta Zeta: 220,000 members
  8. Alpha Delta Pi: 215,000 members
  9. Alpha Chi Omega: 210,000 members
  10. Zeta Tau Alpha: 207,000 members

10 Largest Sororities by Active Chapters

  1. Alpha Omicron Pi: 184 active chapters
  2. Alpha Gamma Delta: 182 active chapters
  3. Gamma Phi Beta: 173 active chapters
  4. Chi Omega: 171 active chapters
  5. Delta Zeta: 160 active chapters
  6. Zeta Tau Alpha: 157 active chapters
  7. Alpha Phi: 154 active chapters
  8. Delta Gamma: 146 active chapters
  9. Kappa Delta: 142 active chapters
  10. Delta Delta Delta: 138 active chapters

Sorority vs. Women’s Fraternity

The word sorority was actually coined for Gamma Phi Beta, and all women’s Greek organizations (and even many afterward) were called “women’s fraternities.” In addition, two sororities, Alpha Delta Pi and Phi Mu, were founded as academic societies and didn’t originally have Greek letters.

Nevertheless, for the purpose of listing the largest sororities, they are all considered to be sororities.

Interesting Facts About the Largest Sororities

  • The oldest sorority on either list is Alpha Delta Pi, founded in 1851 as the Adelphean Society. It didn’t officially adopt Greek letters until 1905.
  • The oldest sorority on both lists is Delta Delta Delta, founded in 1888.
  • The youngest sorority on either list is Alpha Gamma Delta, founded in 1904.
  • The youngest sorority on both lists is Delta Zeta, founded in 1902.

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