There are 21 US Post Offices in Saratoga County serving a total of 243,829 residents equating to 11,611 residents per post office. It's estimated that approximately 389,178 packages are handled across the 21 county post offices annually. Saratoga County is a county located in the U.S. state of New York. As of the 2015 U.S. Census estimate, the county's population was 226,249, representing a 3.0% increase from the 2010 population of 219,607, representing one of the fastest growth rates in the northeastern United States. The county seat is Ballston Spa. Saratoga County is included in the Capital District, encompassing the Albany-Schenectady-Troy, New York Metropolitan Statistical Area. The name of Saratoga County was derived from the Native American word \"sah-rah-ka\", or \"Sarach-togue\", meaning \"the hill beside the river\", referring to the Hudson River bordering the county on its eastern flank and the Mohawk River delineating its southern border. Saratoga County, bisected by the toll-free, six-lane Adirondack Northway, serves as an outdoor recreational haven and as the gateway to the Adirondack Mountains and State Park for the populations of the Albany and New York City metropolitan areas. The county is also home to the internationally renowned Saratoga Race Course, one of the oldest venues in horse racing. Saratoga County lies at the heart of eastern New York State's recognized Tech Valley, a growing center for the computer hardware side of the high-technology industry and its concomitant venture capital investment, with great strides in the nanotechnology sector, digital electronics design, and water- and electricity-dependent integrated microchip circuit manufacturing, involving companies including IBM, GlobalFoundries, Samsung, and Taiwan Semiconductor, among others. The \"Fab 8\" campus of GlobalFoundries, a company specializing in the semiconductor industry, is a multibillion-dollar venture being developed in Saratoga County."