Mason County, Washington Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Mason County, WA Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around averageLess healthy than 82% of counties in Washington
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C
Income Below average
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D
Education Well below averageLess educated than 84% of counties in Washington
Source: Map AI Methodology
Population: density and quick facts
| Metric | Mason County | Washington Avg | U.S. Average |
|---|---|---|---|
| Population | 67,950 | 7,801,159 | 337,468,954 |
| Population density (per sq mi) | 64.7 | 109.3 | 86.4 |
| Population growth (%/yr) | 1.35% | 1.21% | 0.59% |
| Median age | 43.6 | 36.2 | 37.3 |
| Households | 26,017 | 3,058,619 | 130,235,071 |
Population in Mason County grew by 20.6% from 2009 to 2024, reaching 67,950 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Mason County is Boomers, aged 61–79, at 23.8% of residents. That is 7.6 points above Washington as a whole.
- Gen Z 13–28 11,904 17.5% -3.9 pts
- Millennials 29–44 13,004 19.1% -4.2 pts
- Gen X 45–60 13,865 20.4% +0.9 pts
- Boomers 61–79 16,184 23.8% +7.6 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Washington, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 48.0% of the people living in Mason County and men 52.0%.
- Women 48.0% Washington 49.7%
- Men 52.0% Washington 50.3%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Mason County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Mason County has a the economy index of C, which means it is somewhat prosperous.
| Metric | Mason County | Washington Avg | U.S. Average |
|---|---|---|---|
| Median household income | $83,435 | $98,224 | $80,455 |
| Income growth (%/yr) | 6.23% | 5.64% | 4.80% |
| Unemployment rate | 6.5% | 5.0% | 5.2% |
The median household income in Mason County is about 15% lower than in Washington.
Housing
| Metric | Mason County | Washington Avg | U.S. Average |
|---|---|---|---|
| Median home price | $354,523 | $485,016 | $248,835 |
| Median rent | $1,285 | $1,759 | $1,407 |
| Homeownership rate | 82.3% | 63.8% | 65.2% |
The median home price in Mason County is about 23.0 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,285 per month for that long.
Commute Time & Mobility
Commuters in Mason County spend about 64 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 266 hours, about 11.1 full days, spent commuting.
| Metric | Mason County | Washington Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 32.0 | 22.4 | 22.4 |
| Round-trip commute (min) | 63.9 | 44.8 | 44.8 |
| Yearly time spent (hours) | 266 | 187 | 187 |
| Estimated yearly cost | $8,258 | $5,785 | $5,790 |
| Work from home | 14.5% | 19.8% | 15.0% |
| Highway traffic (vehicles/day) | 19,003 | 10,119 | 8,813 |
| Local road traffic (vehicles/day) | 1,477 | 1,525 | 1,355 |
Fastest commutes among counties in
Washington:
Walla Walla County (12.2 min), San Juan County (12.3 min), Asotin County (13.2 min).
Slowest:
Mason County (32.0 min), Garfield County (28.4 min), Snohomish County (28.3 min).
The average commute time in Mason County is 32 minutes, longer than the 22 minutes in Washington.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Mason County has a education index of D, which means it is barely educated.
| Metric | Mason County | Washington Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 20.0% | 35.1% | 31.6% |
| Average household size | 2.55 | 2.50 | 2.53 |
Highest education index among counties in
Washington:
King County (0.4), San Juan County (0.4), Jefferson County (0.4).
Lowest:
Adams County (0.2), Yakima County (0.2), Grant County (0.2).
Health
Mason County has a health index of B, which means it is quite healthy.
| Metric | Mason County | Washington Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 77.4 | 79.6 | 78.3 |
| Self-rated poor health | 17.5% | 15.4% | 16.3% |
| Smokers | 19.0% | 16.4% | 19.0% |
Highest health index among counties in
Washington:
King County (0.8), Whitman County (0.8), San Juan County (0.8).
Lowest:
Adams County (0.8), Okanogan County (0.8), Pacific County (0.8).
Mason County, WA Compared With Nearby Counties
Mason County, WA is typical in size for this group, 67,950 residents against a local median of 77,052, so the measures below are close to a like for like comparison. Where Mason County, WA breaks from the counties next to it is commute, sitting 77% above the local median of 18.1 min at 32.0 min. That is the weaker end of the local range on this measure.
The counties themselves sit within 6.5 min of each other on commute, a tighter band than the gap between any of them and Mason County, WA, which makes it a genuine outlier here rather than one end of a wide local spread. Mason County, WA has the 6th lowest commute of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Mason County, WA | 67,950 | $83,435 #3/6 | $354,523 #4/6 | 32.0 min #6/6 |
| Thurston County, WA | 299,046 | $96,312 | $427,911 | 22.1 min |
| Jefferson County, WA | 33,577 | $73,997 | $380,268 | 16.5 min |
| Kitsap County, WA | 276,921 | $104,681 | $617,222 | 21.8 min |
| Grays Harbor County, WA | 77,052 | $64,416 | $260,869 | 18.1 min |
| Pacific County, WA | 23,983 | $66,561 | $346,903 | 15.6 min |
Frequently Asked Questions
Common questions about Mason County, Washington.
What is the population of Mason County, Washington?
About 67,950 people live in Mason County, Washington, in 26,017 households of 2.5 people on average. The median age is 43.6, so residents are older than the U.S. median of 37.3 by about 6 years.
How densely populated is Mason County, Washington?
Averaged over its land area, Mason County, Washington has 65 people per square mile, a density typical of rural areas. That is close to the U.S. average of 86.
Is Mason County, Washington an affordable place to live?
The median home costs 4.2 times the median household income ($354,523 against $83,435), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,285 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Mason County, Washington?
Unemployment in Mason County, Washington is 6.5%, well above the U.S. rate of 5.2%, so job seekers may face more competition than elsewhere.
How educated are people in Mason County, Washington?
20.0% of adults in Mason County, Washington hold a bachelor's degree or higher (about 1 in 5), well below the U.S. share of 31.6%.
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