Sullivan County vs Williamson County

A side-by-side comparison of Sullivan County and Williamson County: population, income, housing, and more.

Sullivan County and Williamson County are counties in Tennessee. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Williamson County has the higher population (254,609 vs 159,693 in Sullivan County). Williamson County has the higher median household income ($131,202 vs $56,802 in Sullivan County). Williamson County has the higher median home value ($673,700 vs $190,800 in Sullivan County).

Population, income & housing

	Sullivan County	Williamson County
Population	159,693	254,609
Median age	45.0 yrs	40.3 yrs
Median household income	$56,802	$131,202
Median home value	$190,800	$673,700
Median gross rent	$850	$1,895
Housing units	75,917	94,418
Homeownership rate	72.9%	79.8%
Bachelor's degree or higher	26.6%	61.8%
Unemployment rate	6.0%	2.0%

Trends (ACS 5-year, 2019–2023)

	Sullivan County	Williamson County
Population	157,050 → 159,693 (+1.7%)	225,389 → 254,609 (+13.0%)
Median household income	$46,684 → $56,802 (+21.7%)	$112,962 → $131,202 (+16.1%)
Median home value	$141,300 → $190,800 (+35.0%)	$449,000 → $673,700 (+50.0%)
Median gross rent	$668 → $850 (+27.2%)	$1,500 → $1,895 (+26.3%)

Sullivan County

Population

157,050159,693

Median household income

$46,684$56,802

Median home value

$141,300$190,800

Median gross rent

$668$850

Williamson County

Population

225,389254,609

Median household income

$112,962$131,202

Median home value

$449,000$673,700

Median gross rent

$1,500$1,895

Age & race/ethnicity

Age distribution (share)

	Sullivan County	Williamson County
Under 5	4.8%	5.4%
5 to 17	14.4%	20.8%
18 to 24	7.5%	7.9%
25 to 34	12.1%	8.9%
35 to 44	11.2%	14.7%
45 to 54	13.6%	15.1%
55 to 64	14.4%	12.8%
65 to 74	12.6%	8.9%
75 and over	9.4%	5.4%

Race & ethnicity (share)

	Sullivan County	Williamson County
White (non-Hispanic)	92.1%	81.5%
Black or African American	2.0%	3.8%
American Indian & Alaska Native	0.1%	0.0%
Asian	0.8%	5.2%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.2%	0.5%
Two or more races	2.3%	3.2%
Hispanic or Latino	2.4%	5.8%

Educational attainment (age 25+)

Share of adults 25+

	Sullivan County	Williamson County
No high school diploma	10.4%	4.1%
High school graduate	32.6%	13.2%
Some college or associate's	30.4%	20.9%
Bachelor's degree	17.7%	38.3%
Graduate or professional degree	8.9%	23.5%

Commute to work

How workers get to work (share)

	Sullivan County	Williamson County
Drove alone	81.7%	66.9%
Carpooled	6.8%	5.3%
Public transit	0.1%	0.1%
Walked	1.0%	0.7%
Bicycle	0.0%	0.0%
Worked from home	9.1%	25.8%
Other means	1.4%	1.1%

Housing

Units in structure (share)

	Sullivan County	Williamson County
1-unit, detached	70.1%	78.1%
1-unit, attached	2.4%	5.3%
2 to 4 units	6.3%	2.3%
5 to 19 units	7.7%	5.4%
20 or more units	2.6%	7.2%
Mobile home & other	10.8%	1.7%

Poverty & households

	Sullivan County	Williamson County
Poverty rate	14.9%	4.5%
Average household size	2.30	2.80
Mean commute (minutes)	22	28
Median year structure built	1976	2001