Chance of a Thunderstorm95°/72°
Chance of a Thunderstorm93°/72°
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’s roots are in agriculture. However after World War II, Indianapolis grew north and the county and the towns within it developed as a suburb. Many farm fields have been replaced by both residential and commercial development.