Blackshear The red-brick Atlantic Coast Line depot in Blackshear, built in 1903, now houses the Pierce County Heritage Museum and the local Chamber of Commerce. (200 S. Central Avenue). Blackshear, population 3,286, is the county seat of Pierce County in southeast Georgia.   Georgia's Railroad History & Heritage. Copyright, Steve Storey. Railroad History | The Depot List | Locomotives On Display | Odds & Ends | Sources & References | Home