• county
  • FIPS 53045
  • Largest town: Shelton

Mason County, Washington

Mason County had 69,632 residents in the Census Vintage 2024 estimate, on 959.6 square miles of land. It ranks 20th of 39 in Washington by population and 29th by land area.

Population
69,632
#20 of 39 in Washington · #791 in US
Area
959.6 sq mi
#29 of 39 in Washington · #731 in US
Density
73 / sq mi
#15 of 39 in Washington · #1,151 in US
Median household income
$75,138
#15 of 39 in Washington · #661 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Mason County within Washington. Pin: Olympia.

Measure from here

Tools and pages that start from Mason County

Mason County population, land area and income

Mason County had 69,632 residents in the Census Vintage 2024 estimate, on 959.6 square miles of land. It ranks 20th of 39 in Washington by population and 29th by land area. That works out to 72.6 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Washington has 69,632 residents, about the same as Mason County.

Its SAIPE 2023 median household income of $75,138 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

69,632

3144th1st

791st of 3,144 (US)

Land area

960 sq mi

3144th1st

731st of 3,144 (US)

Density

72.6 / sq mi

3144th1st

1151st of 3,144 (US)

Median household income

$75,138

3143rd1st

661st of 3,143 (US)

Rank within Washington (39)

Population

69,632

39th1st

20th of 39 (WA)

Land area

960 sq mi

39th1st

29th of 39 (WA)

Density

72.6 / sq mi

39th1st

15th of 39 (WA)

Median household income

$75,138

39th1st

15th of 39 (WA)

How Mason County's population changed since 2020

Mason County gained 3,599 residents between the July 2020 and July 2024 estimates, a rise of 5.5%. That ranks 7th of 39 in Washington for growth. The median Washington county changed by +3.2%, and the state as a whole by +3.0%.

Since the April 2020 estimates base, Mason County recorded 2,724 births and 3,501 deaths, a natural change of -777. Net international migration added +1,008 and net domestic migration, people moving to or from other US counties, came to +3,717. The largest single component was domestic migration, which added 3,717 people.

66.0k202067.3k202168.2k202268.8k202369.6k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
2,724
Deaths
3,501
Net international migration
+1,008
Net domestic migration
+3,717
Change, July 2023 to July 2024
+878

Where Mason County is

The Census internal point of Mason County is at 47.350800, -123.173100. It sits in UTM zone 10N. The map shades Washington's 39 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Mason County outlined. Dots are towns of 1,000+ people with residents in it.

King County: +2.9%Thurston County: +2.3%Garfield County: +4.7%Adams County: +2.1%Kitsap County: +2.0%Mason County: +5.5%Stevens County: +5.2%Walla Walla County: -0.9%Whitman County: +1.2%Pierce County: +1.9%Benton County: +5.2%Columbia County: +1.8%Skamania County: +5.1%Douglas County: +6.4%Kittitas County: +2.9%Klickitat County: +5.7%Pacific County: +3.2%Grant County: +5.3%Grays Harbor County: +2.7%Jefferson County: +2.7%Lincoln County: +8.6%San Juan County: +4.7%Skagit County: +2.2%Island County: -0.6%Ferry County: +4.8%Chelan County: +2.4%Clark County: +4.3%Asotin County: +0.9%Franklin County: +4.2%Whatcom County: +3.3%Snohomish County: +4.1%Pend Oreille County: +6.1%Yakima County: +0.7%Clallam County: +0.8%Wahkiakum County: +7.9%Spokane County: +2.7%Okanogan County: +6.6%Cowlitz County: +2.7%Lewis County: +5.4%
Change 2020 to 2024
  1. < +1.9%
  2. < +2.7%
  3. < +4.2%
  4. < +5.3%
  5. ≥ +5.3%
no data

Orange pin: Mason County internal point. Dark pin: Olympia.

Internal point

Decimal
47.350800, -123.173100
DMS
47°21'2.88"N 123°10'23.16"W
UTM
10N 486926.4E 5244163.0N
Geohash
c22mm5un6
Plus code
84VR9R2G+8Q

Towns in Mason County

One incorporated place of 1,000+ people has residents in Mason County, 10,737 people together, or 15% of the county. Each figure counts only the part of the town inside Mason County; towns marked "part" extend into another county. The largest is Shelton with 10,737.

  1. 01Shelton10,737
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Mason County

The Census 2024 county adjacency file lists 5 neighbors for Mason County. The most populous is Pierce County, WA, with 941,170 residents. Distances run between Census internal points in a straight line.

Distance to Olympia and the nearest big city

Olympia is 25.2 miles SSE of Mason County's internal point in a straight line. The nearest place of 100,000 or more is Tacoma, WA (population 228,202), 34.1 miles away. The nearest place of 10,000 or more is Shelton, WA (population 10,737), 9.1 miles away.

Mason County FIPS code

The FIPS code of Mason County is 53045: state code 53 for Washington plus county code 045. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $75,138.

Questions people ask

What is the population of Mason County, Washington?

The Census Vintage 2024 estimate for July 1, 2024 is 69,632. That is up 3,599 people (5.5%) from the July 2020 estimate of 66,033.

What is the FIPS code of Mason County?

53045. The first two digits (53) are Washington; the last three (045) identify the county.

What is the largest town in Mason County?

Shelton, with 10,737 residents inside Mason County in 2024.

Which counties border Mason County?

5 county-equivalents border it in the Census 2024 adjacency file: Pierce County, WA; Thurston County, WA; Kitsap County, WA; Grays Harbor County, WA; Jefferson County, WA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.