ZIP Code Tabulation Area · Washington

ZIP Code 98584: Mason County, WA

ZIP Code 98584 (Mason County, Washington) has an estimated 40,606 residents in 14,870 households. The median household income is $78,610, the median home value is $393,000 and the median gross rent is $1,315/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

40,606

Margin of error ±1,230

Median household income

$78,610

Margin of error ±$5,892

Median home value

$393,000

Margin of error ±$14,645

Median gross rent

$1,315/mo

Margin of error ±$91

Median age

41.3 yrs

Margin of error ±1.2 yrs

Mean travel time to work

32.4 min

Margin of error ±4.1 min

How ZIP 98584 compares with Washington and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 9858441.3 yrsWashington38.3 yrsUnited States38.9 yrs

Median household income

ZIP 98584$78,610Washington$98,141United States$80,734

Per capita income

ZIP 98584$37,190Washington$53,744United States$44,673

Poverty rate

ZIP 9858414.7%Washington9.9%United States12.5%

Unemployment rate

ZIP 985845.9%Washington5.1%United States5.2%

Bachelor's degree or higher

ZIP 9858420.3%Washington39.6%United States35.7%

Median home value

ZIP 98584$393,000Washington$564,600United States$332,700

Median gross rent

ZIP 98584$1,315/moWashington$1,760/moUnited States$1,413/mo

Owner-occupied homes

ZIP 9858479.8%Washington63.8%United States65.2%

Mean travel time to work

ZIP 9858432.4 minWashington26.6 minUnited States26.4 min

Worked from home

ZIP 9858414.6%Washington19.8%United States15.1%

All figures for ZIP 98584

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 98584 — ACS 2020–2024 5-year estimates
Measure	ZIP 98584	Margin of error	Washington	United States
Total population	40,606	±1,230	7,816,116	334,922,499
Median age	41.3 yrs	±1.2 yrs	38.3 yrs	38.9 yrs
Households	14,870	±545	3,064,820	129,227,496
Median household income	$78,610	±$5,892	$98,141	$80,734
Per capita income	$37,190	±$1,991	$53,744	$44,673
Poverty rate	14.7%	±2.1 pts	9.9%	12.5%
Unemployment rate	5.9%	±1.8 pts	5.1%	5.2%
Bachelor's degree or higher	20.3%	±1.6 pts	39.6%	35.7%
Median home value	$393,000	±$14,645	$564,600	$332,700
Median gross rent	$1,315/mo	±$91	$1,760/mo	$1,413/mo
Owner-occupied homes	79.8%	±1.4 pts	63.8%	65.2%
Mean travel time to work	32.4 min	±4.1 min	26.6 min	26.4 min
Worked from home	14.6%	±2.5 pts	19.8%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 98584
Group	ZIP 98584	Washington	United States
White alone, not Hispanic or Latino	70.9%	63.1%	57.4%
Black or African American alone, not Hispanic or Latino	0.8%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	2.2%	0.8%	0.5%
Asian alone, not Hispanic or Latino	0.6%	9.7%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.3%	0.7%	0.2%
Some other race alone, not Hispanic or Latino	0.8%	0.6%	0.6%
Two or more races, not Hispanic or Latino	7.8%	6.8%	4.3%
Hispanic or Latino (of any race)	16.6%	14.4%	19.3%

Where ZIP 98584 is

State: Washington
Main county: Mason County
Largest overlapping place: Skokomish (2% of the ZIP's land area)
Land area: 359.48 sq mi· about 113 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Mason County

98524 Grapeview, WA 98528 Mason County, WA 98546 Mason County, WA 98548 Mason County, WA 98555 Mason County, WA 98560 Mason County, WA 98588 Mason County, WA 98592 Mason County, WA

See every ZIP code in Washington, or compare ZIP 98584 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.