Williamson County Demographics

A map of Williamson County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	210,687	200,408	80.9%	80.9%
Hispanic	15,611	14,261	6.0%	5.8%
Asian	13,865	12,879	5.3%	5.2%
Black	10,162	9,709	3.9%	3.9%
Multiracial	8,475	8,941	3.3%	3.6%
Native American/Other	1,551	1,528	0.6%	0.6%

Williamson County, Tennessee has an estimated population of 260,351, an increase from the 247,726 recorded in the 2020 Census. The population is 80.9% White, 6.0% Hispanic, 5.3% Asian, 3.9% Black, 3.3% Multiracial, and 0.6% Native American/Other. This demographic dot map shows the population of Williamson County, with one dot drawn for each person counted by the Census, color-coded by race.

Williamson is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Tennessee overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Williamson County, that probability was 33.7% in 2020 and 33.6% in the most recent ACS estimates.

Williamson County is ranked the 6th most populous county in Tennessee, out of 95 counties. Williamson County was ranked the 6th most populous county in the 2020 Census.

Williamson County's White Population

210,687 residents of Williamson County, or 80.9% of the population, identify as White. The share of White residents in Williamson County is higher than in Tennessee overall, where 71% of the population is White. Williamson County ranks 70th statewide in terms of White residents as a share of the population, out of 95 counties.

Since the 2020 Census, Williamson County's White population has grown by an estimated 5.1%. White residents' share of Williamson County's population has remained roughly unchanged at 80.9%.

Williamson County is more White than neighboring Davidson County (53.2% White), Maury County (76.3% White), and Rutherford County (63.7% White). Williamson County is less White than neighboring Cheatham County (89.1% White), and Marshall County (83% White).

Williamson County's Black Population

10,162 residents of Williamson County, or 3.9% of the population, identify as Black. The share of Black residents in Williamson County is considerably lower than in Tennessee overall, where 15.4% of the population is Black. Williamson County ranks 40th statewide in terms of Black residents as a share of the population, out of 95 counties.

Since the 2020 Census, Williamson County's Black population has grown by an estimated 4.7%. Black residents' share of Williamson County's population has remained roughly unchanged at 3.9%.

Williamson County is more Black than neighboring Cheatham County (2% Black), and Marshall County (3.7% Black). Williamson County is less Black than neighboring Davidson County (24.3% Black), Maury County (10.3% Black), and Rutherford County (14.7% Black).

Williamson County's Asian Population

13,865 residents of Williamson County, or 5.3% of the population, identify as Asian. The share of Asian residents in Williamson County is slightly higher than in Tennessee overall, where 1.9% of the population is Asian. Williamson County ranks 1st statewide in terms of Asian residents as a share of the population, out of 95 counties.

Since the 2020 Census, Williamson County's Asian population has grown by an estimated 7.7%. Asian residents' share of Williamson County's population has remained roughly unchanged at 5.3%.

Williamson County is more Asian than neighboring Davidson County (3.4% Asian), Maury County (1% Asian), Cheatham County (0.7% Asian), Marshall County (0.7% Asian), and Rutherford County (3.6% Asian).

Williamson County's Hispanic Population

15,611 residents of Williamson County, or 6.0% of the population, identify as Hispanic. The share of Hispanic residents in Williamson County is comparable to the share in Tennessee overall, where 7.4% of the population is Hispanic. Williamson County ranks 23rd statewide in terms of Hispanic residents as a share of the population, out of 95 counties.

Since the 2020 Census, Williamson County's Hispanic population has grown by an estimated 9.5%. Hispanic residents' share of Williamson County's population has remained roughly unchanged at 6.0%.

Williamson County is more Hispanic than neighboring Cheatham County (4.8% Hispanic). Williamson County is less Hispanic than neighboring Davidson County (13.9% Hispanic), Maury County (8.1% Hispanic), Marshall County (7.1% Hispanic), and Rutherford County (12.2% Hispanic).

Williamson County's Native American/Other Population

1,551 residents of Williamson County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Williamson County is comparable to the share in Tennessee overall, where 0.6% of the population is Native American/Other. Williamson County ranks 26th statewide in terms of Native American/Other residents as a share of the population, out of 95 counties.

Since the 2020 Census, Williamson County's Native American/Other population has grown by an estimated 1.5%. Native American/Other residents' share of Williamson County's population has remained roughly unchanged at 0.6%.

Williamson County is more Native American/Other than neighboring Maury County (0.4% Native American/Other), and Cheatham County (0.5% Native American/Other). Williamson County is less Native American/Other than neighboring Davidson County (0.7% Native American/Other), Marshall County (0.9% Native American/Other), and Rutherford County (0.8% Native American/Other).

Williamson County's Multiracial Population

8,475 residents of Williamson County, or 3.3% of the population, identify as Multiracial. The share of Multiracial residents in Williamson County is comparable to the share in Tennessee overall, where 3.7% of the population is Multiracial. Williamson County ranks 53rd statewide in terms of Multiracial residents as a share of the population, out of 95 counties.

Since the 2020 Census, Williamson County's Multiracial population has declined by an estimated 5.2%. Multiracial residents' share of Williamson County's population has remained roughly unchanged at 3.3%.

Williamson County is more Multiracial than neighboring Cheatham County (2.9% Multiracial). Williamson County is less Multiracial than neighboring Davidson County (4.6% Multiracial), Maury County (3.9% Multiracial), Marshall County (4.6% Multiracial), and Rutherford County (5% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.