Indiana State Spring Informals:

AOPi = 3
Chi O = 1
Alpha Phi = 11
GPhiB = 7
AXO = 5

Average chapter size for:

University of Missouri per the grade reports was 295.4 (Fall 2016) / 278.53 (Spring 2017)

Georgia Southern 206 (Fall 2016) / 202 (Spring 2017)

Also, according to the consolidation website for Armstrong State & Georgia Southern, the recommendation for Fraternity and Sorority life states:

"Recommends combining Fraternity and Sorority Life operating policies and procedures, while maintaining the integrity of chapters on each campus"

So it sounds like, each campus will have their own groups, a la UNC, unlike the Kennesaw/Southern Poly merger

That's good, since the 2 campuses are at least an hour apart.

Average chapter size for:

Alabama: 425.75 (Fall 2016)* assuming SDT is not factored in when calculating total
Kennesaw State: 201.71 (Fall 2016)
Georgia State: 86.4 (Fall 2016)
Mercer: 95.25 (Fall 2016)
Georgia: 257.11 (Fall 2016)/245.55 (Spring 2017)
Valdosta State: 67.66 (Spring 2017)

Total:
West Georgia: 99 (Fall 2016)

Griffins & Quills, is this official information from Panhellenic or are you calculating it yourself from grade reports?

From the grade reports. Might not help, since they may be calculating total differently than average chapter size. West Georgia's grade report specifically listed Total though.

Probably not the best data collection source/method.