Mason County Demographics

A map of Mason County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	50,945	49,591	74.9%	75.5%
Hispanic	8,685	7,595	12.8%	11.6%
Multiracial	5,213	4,497	7.7%	6.8%
Native American/Other	1,799	2,597	2.6%	4.0%
Black	690	688	1.0%	1.0%
Asian	650	758	1.0%	1.2%

Mason County, Washington has an estimated population of 67,982, an increase from the 65,726 recorded in the 2020 Census. The population is 74.9% White, 12.8% Hispanic, 7.7% Multiracial, 2.6% Native American/Other, 1.0% Black, and 1.0% Asian. This demographic dot map shows the population of Mason County, with one dot drawn for each person counted by the Census, color-coded by race.

Mason is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Washington overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Mason County, that probability was 41.1% in 2020 and 41.5% in the most recent ACS estimates.

Mason County is ranked the 20th most populous county in Washington, out of 39 counties. Mason County was ranked the 20th most populous county in the 2020 Census.

Mason County's White Population

50,945 residents of Mason County, or 74.9% of the population, identify as White. The share of White residents in Mason County is considerably higher than in Washington overall, where 63.1% of the population is White. Mason County ranks 19th statewide in terms of White residents as a share of the population, out of 39 counties.

Since the 2020 Census, Mason County's White population has grown by an estimated 2.7%. White residents' share of Mason County's population has decreased from 75.5% to 74.9%.

Mason County is more White than neighboring Thurston County (69.5% White), and Kitsap County (72.6% White). Mason County is less White than neighboring Jefferson County (84.6% White), Grays Harbor County (76% White), and Pacific County (79.4% White).

Mason County's Black Population

690 residents of Mason County, or 1.0% of the population, identify as Black. The share of Black residents in Mason County is slightly lower than in Washington overall, where 3.8% of the population is Black. Mason County ranks 14th statewide in terms of Black residents as a share of the population, out of 39 counties.

Since the 2020 Census, Mason County's Black population has remained roughly the same. Black residents' share of Mason County's population has remained roughly unchanged at 1.0%.

Mason County is more Black than neighboring Jefferson County (0.3% Black), and Pacific County (0.5% Black). Mason County is less Black than neighboring Thurston County (3.2% Black), Kitsap County (2.2% Black), and Grays Harbor County (1.5% Black).

Mason County's Asian Population

650 residents of Mason County, or 1.0% of the population, identify as Asian. The share of Asian residents in Mason County is lower than in Washington overall, where 9.7% of the population is Asian. Mason County ranks 23rd statewide in terms of Asian residents as a share of the population, out of 39 counties.

Since the 2020 Census, Mason County's Asian population has declined by an estimated 14.2%. Asian residents' share of Mason County's population has remained roughly unchanged at 1.0%.

Mason County is less Asian than neighboring Thurston County (6% Asian), Jefferson County (1.3% Asian), Kitsap County (4.8% Asian), Grays Harbor County (1.3% Asian), and Pacific County (1.6% Asian).

Mason County's Hispanic Population

8,685 residents of Mason County, or 12.8% of the population, identify as Hispanic. The share of Hispanic residents in Mason County is comparable to the share in Washington overall, where 14.4% of the population is Hispanic. Mason County ranks 14th statewide in terms of Hispanic residents as a share of the population, out of 39 counties.

Since the 2020 Census, Mason County's Hispanic population has grown by an estimated 14.4%. Hispanic residents' share of Mason County's population has increased from 11.6% to 12.8%.

Mason County is more Hispanic than neighboring Thurston County (10.6% Hispanic), Jefferson County (4.4% Hispanic), Kitsap County (9.4% Hispanic), Grays Harbor County (11.2% Hispanic), and Pacific County (9.9% Hispanic).

Mason County's Native American/Other Population

1,799 residents of Mason County, or 2.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Mason County is comparable to the share in Washington overall, where 2.1% of the population is Native American/Other. Mason County ranks 7th statewide in terms of Native American/Other residents as a share of the population, out of 39 counties.

Since the 2020 Census, Mason County's Native American/Other population has declined by an estimated 30.7%. Native American/Other residents' share of Mason County's population has decreased from 4.0% to 2.6%.

Mason County is more Native American/Other than neighboring Kitsap County (2.4% Native American/Other). Mason County is less Native American/Other than neighboring Thurston County (2.8% Native American/Other), Jefferson County (2.8% Native American/Other), Grays Harbor County (4.7% Native American/Other), and Pacific County (3% Native American/Other).

Mason County's Multiracial Population

5,213 residents of Mason County, or 7.7% of the population, identify as Multiracial. The share of Multiracial residents in Mason County is comparable to the share in Washington overall, where 6.8% of the population is Multiracial. Mason County ranks 7th statewide in terms of Multiracial residents as a share of the population, out of 39 counties.

Since the 2020 Census, Mason County's Multiracial population has grown by an estimated 15.9%. Multiracial residents' share of Mason County's population has increased from 6.8% to 7.7%.

Mason County is more Multiracial than neighboring Jefferson County (6.5% Multiracial), Grays Harbor County (5.2% Multiracial), and Pacific County (5.5% Multiracial). Mason County is less Multiracial than neighboring Thurston County (7.9% Multiracial), and Kitsap County (8.6% 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.