National sororities that pioneered on a campus

[oldu]

In an accompanying thread I listed the number of institutions and the era in which national sororities were introduced. I thought it would be interesting to see which sororities they were.

By 1900 the sororities with the largest number of chapters which were the first on campus are obviously the oldest groups:

Pi Beta Phi, 24
Kappa Alpha Theta, 20
Kappa Kappa Gamma, 20
Delta Gamma, 12
Chi Omega, 7
Alpha Omicron Pi, 2
Alpha Phi, 2
Delta Delta Delta, 2

A half century later the pattern changed and some of the older groups became much more conservative and newer groups became more aggressive at introducing sorority life at new institutions. The groups with the most pioneer chapters by 1950 were:

Chi Omega, 40
Pi Beta Phi, 37
Sigma Sigma Sigma, 29
Kappa Alpha Theta, 27
Alpha Kappa Alpha, 24
Kappa Kappa Gamma, 22
Delta Sigma Theta, 20
Delta Sigma Epsilon, 17
Kappa Delta, 17
Alpha Sigma Alpha, 15
Delta Gamma, 14
Zeta Phi Beta, 13
Alpha Delta Pi, 12
Pi Kappa Sigma, 12
Alpha Xi Delta, 10

Move forward to today and the list reshuffles even more. It is interesting that some groups have sought out new territory, while some other older and larger groups have tended to wait until a Greek system is well established before placing a chapter. As of today the chapters which were the pioneer sorority on campus are as follows:

Chi Omega, 62
Delta Zeta, 62
Sigma Sigma Sigma, 50
Alpha Xi Delta, 41
Delta Sigma Theta, 41
Kappa Alpha Theta, 41
Pi Beta Phi, 41
Phi Mu, 41
Alpha Kappa Alpha, 39
Kappa Delta, 37
Kappa Kappa Gamma, 33
Alpha Sigma Tau, 32
Alpha Delta Pi, 31
Zeta Tau Alpha, 29
Delta Gamma, 28
Gamma Phi Beta, 28
Alpha Phi, 27
Alpha Sigma Alpha, 26
Phi Sigma Sigma, 25
Sigma Kappa, 24
Theta Phi Alpha, 23
Alpha Omicron Pi, 21
Delta Delta Delta, 21
Delta Phi Epsilon, 21
Zeta Phi Beta, 21
Delta Sigma Epsilon, 18
Alpha Chi Omega, 14
Alpha Gamma Delta, 14
Sigma Gamma Rho, 14
Pi Kappa Sigma, 13
Alpha Epsilon Phi, 10
Beta Sigma Omicron, 9
Sigma Delta Tau, 6