Posted on: Irwin County, Ga Query Forum Reply Here: http://cgi.rootsweb.com/~genbbs/genbbs.cgi/USA/Ga/Irwin/409 Surname: ------------------------- Jeffery, go to: www.cviog.uga.edu/Projects/gainfo/courthouses/irwinCH.htm This site has plentiful information about Irwin County and says that Irwin County was Georgia's 41st county and is made up of 362 square miles.