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Sullivan County, TN (shown in white) has 413.54 mi² of land area and 16.16 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 1,181.1' to a high of 4,202.8', with a weighted average of 1,709.7' above sea level.
Temperatures range from average lows around 26.1°F to average highs around 86.6°F. A year-round daily temperature averages 56.8°F. Average annual precipation is 47.7". With these temperatures and precipation, the majority of the county scores as an 7A 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 Sullivan County is 161,517 with 69,323 households. These households are spread across 10 unique municipalties (not all shown).
