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is a city in north Fulton County, Georgia, United States. According to a 2008 estimate, Alpharetta's population is 65,168.
Selected for its location next to a spring, it began as a campground, originally known as New Prospect Camp Ground until late 1858. Officially chartered on December 11 of that year, Alpharetta (supposedly Greek for "first town") served as the county seat of Milton County until the end of 1931 when Milton was merged with Fulton County to avoid bankruptcy during the Great Depression.
Despite its poor start, and being one of the farthest-out large suburbs in metro Atlanta, it now features several mid-rise buildings, which are home to many high-tech companies including Hewlett-Packard, UPS Supply Chain Solutions , RedPrairie , Radiant Systems , Infor, Lucent, Nortel, IBM, Sun Microsystems, AT&T, Siemens, McKesson Corporation, Verizon, Verizon Wireless, Alltel, E-Trade, Hansgrohe, General Electric, and ChoicePoint.
According to the United States Census Bureau, the city has a total area of 55.4 km² (21.4 sq mi). 21.4 square miles (55.3 km²) of it is land and 0.05% is water.