Overview

Union County, AR (shown in white) has 1,039.07 mi² of land area and 16.26 mi² of water resources. The county is bordered by:

• Ashley County, AR
• Bradley County, AR
• Calhoun County, AR
• Claiborne Parish, LA
• Columbia County, AR
• Morehouse Parish, LA
• Ouachita County, AR
• Union Parish, LA

The county's elevations range from a low of 52.5' to a high of 331.4', with a weighted average of 174.2' above sea level.

Temperatures range from average lows around 32.7°F to average highs around 94°F. A year-round daily temperature averages 64°F. Average annual precipation is 54". With these temperatures and precipation, the majority of the county scores as an 8A 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 Union County is 37,934 with 15,718 households. These households are spread across 11 unique municipalties (not all shown).