There are 38 US Post Offices in Fulton County serving a total of 932,505 residents equating to 24,540 residents per post office. It's estimated that approximately 1,488,382 packages are handled across the 38 county post offices annually. Fulton County is a county located in the north central portion of the U.S. state of Georgia. As of 2015 estimates the population was 1,010,562 making it the most populous county in Georgia and the only county to exceed 1 million inhabitants. Its county seat is Atlanta, the state capital since 1868. Ninety percent of the City of Atlanta is within Fulton County (the other 10% lies within DeKalb County). Fulton County is the principal county of the Atlanta metropolitan area. Fulton County is included in the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area.