Calhoun Calhoun's 1854 Western & Atlantic Railroad depot was completely rebuilt within the existing walls several years ago. It now houses community meeting rooms. The county seat of Gordon County, Calhoun is a city of 12,000 in northwest Georgia.   Georgia's Railroad History & Heritage. Copyright, Steve Storey. Railroad History | The Depot List | Locomotives On Display | Odds & Ends | Sources & References | Home