What does SWO stand for?

SWO stands for South Western Ontario

This definition appears somewhat frequently

Other Resources: Acronym Finder has 42 verified definitions for SWO

Samples in periodicals archive:

The South Western Ontario Dairy Symposium is planned and sponsored by Dairy Farmers of Ontario, through its Dairy Producer Committees in Essex-Kent, Lambton...

The Rare Breed Club Of South Western Ontario was formed in 1996 to provide dog enthusiasts with a venue in which they can exhibit and compete in Conformation Shows.

South Western Ontario Road Conditions - ontarioweather.com