Overview

Johnson County, IN (shown in white) has 320.41 mi² of land area and 1.38 mi² of water resources. The county is bordered by:

• Bartholomew County, IN
• Brown County, IN
• Marion County, IN
• Morgan County, IN
• Shelby County, IN

The county's elevations range from a low of 629.9' to a high of 1,000.6', with a weighted average of 776' above sea level.

Temperatures range from average lows around 20.1°F to average highs around 85.2°F. A year-round daily temperature averages 53.1°F. Average annual precipation is 47.8". With these temperatures and precipation, the majority of the county scores as an 6A 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 Johnson County is 171,055 with 63,689 households. These households are spread across 11 unique municipalties (not all shown).