There are 9 US Post Offices in Hamilton County serving a total of 196,164 residents equating to 21,796 residents per post office. It's estimated that approximately 313,100 packages are handled across the 9 county post offices annually. Hamilton County is a county located in the U.S. state of Indiana. Census 2010 recorded a population of 274,569. The county seat is Noblesville. Hamilton County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area Hamilton County\u2019s roots are in agriculture. However, after World War II, Indianapolis grew north and towns in the southern part of the county developed as suburbs. Many farm fields have been replaced by both residential and commercial development. The northern portion of the county remains largely agricultural. Today, the county is one of the fastest-growing counties in the United States. According to 2007 estimates by the U.S. Census, the county\u2019s population increased from an estimated 182,740 in 2000 to 261,661 in 2007, making it the fastest-growing county in Indiana out of 92. Recently, Hamilton County surpassed St. Joseph County in population, making it the fourth most populous in the state. In 2010, Hamilton County was home to three of the state\u2019s 20 largest cities and towns: Carmel (8th), Fishers (9th), and Noblesville (14th). Geist and Morse reservoirs are two man-made lakes in Hamilton County that offer residents and visitors recreational opportunities such as boating, fishing, and waterfront living. In June 2008, Hamilton County was named America\u2019s Best Place to Raise a Family by Forbes.com due to its strong economy, affordable living, top-ranked schools, and close proximity to Indianapolis. The city of Carmel in southwestern Hamilton County was designated CNN Money's top place to live in 2013."