Overview

Hamilton County, IN (shown in white) has 394.38 mi² of land area and 8.09 mi² of water resources. The county is bordered by:

• Boone County, IN
• Clinton County, IN
• Hancock County, IN
• Madison County, IN
• Marion County, IN
• Tipton County, IN

The county's elevations range from a low of 734.9' to a high of 951.4', with a weighted average of 847.9' above sea level.

Temperatures range from average lows around 18.2°F to average highs around 84.5°F. A year-round daily temperature averages 51.8°F. Average annual precipation is 45.3". With these temperatures and precipation, the majority of the county scores as an 5B using the USDA Plant Hardiness Zone Map (the standard by which gardeners and growers can determine which perennial plants are most likely to thrive in a location).

The estimated population of Hamilton County is 380,543 with 140,358 households. These households are spread across 11 unique municipalties (not all shown).