ZIP Code Tabulation Area · Washington

ZIP Code 98603: Cowlitz County, WA

ZIP Code 98603 (Cowlitz County, Washington) has an estimated 1,267 residents in 395 households. The median household income is $78,281, the median home value is $464,500 and the median gross rent is —. 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

Some estimates have a large margin of error. 4 figures for this ZIP (bachelor's or higher, owner-occupied, commute, work from home) are marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

1,267

Margin of error ±510

Median household income

$78,281

Margin of error ±$30,635

Median home value

$464,500

Margin of error ±$91,452

Median gross rent

—

Margin of error not available

Median age

41.3 yrs

Margin of error ±16.9 yrs

Mean travel time to work

48.0 min*

Margin of error ±37.4 min· estimate has a large margin of error

How ZIP 98603 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 9860341.3 yrsWashington38.3 yrsUnited States38.9 yrs

Median household income

ZIP 98603$78,281Washington$98,141United States$80,734

Per capita income

ZIP 98603$25,673Washington$53,744United States$44,673

Poverty rate

ZIP 9860315.0%Washington9.9%United States12.5%

Unemployment rate

ZIP 986030.0%Washington5.1%United States5.2%

Bachelor's degree or higher

ZIP 9860315.9%*Washington39.6%United States35.7%

Median home value

ZIP 98603$464,500Washington$564,600United States$332,700

Median gross rent

ZIP 98603—Washington$1,760/moUnited States$1,413/mo

Owner-occupied homes

ZIP 9860372.9%*Washington63.8%United States65.2%

Mean travel time to work

ZIP 9860348.0 min*Washington26.6 minUnited States26.4 min

Worked from home

ZIP 9860313.3%*Washington19.8%United States15.1%

All figures for ZIP 98603

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 98603 — ACS 2020–2024 5-year estimates
Measure	ZIP 98603	Margin of error	Washington	United States
Total population	1,267	±510	7,816,116	334,922,499
Median age	41.3 yrs	±16.9 yrs	38.3 yrs	38.9 yrs
Households	395	±137	3,064,820	129,227,496
Median household income	$78,281	±$30,635	$98,141	$80,734
Per capita income	$25,673	±$4,382	$53,744	$44,673
Poverty rate	15.0%	±9.7 pts	9.9%	12.5%
Unemployment rate	0.0%	±3.1 pts	5.1%	5.2%
Bachelor's degree or higher	15.9%*	±10.5 pts	39.6%	35.7%
Median home value	$464,500	±$91,452	$564,600	$332,700
Median gross rent	—	—	$1,760/mo	$1,413/mo
Owner-occupied homes	72.9%*	±13.4 pts	63.8%	65.2%
Mean travel time to work	48.0 min*	±37.4 min	26.6 min	26.4 min
Worked from home	13.3%*	±12.8 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 98603
Group	ZIP 98603	Washington	United States
White alone, not Hispanic or Latino	88.5%	63.1%	57.4%
Black or African American alone, not Hispanic or Latino	0.0%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.4%	0.8%	0.5%
Asian alone, not Hispanic or Latino	0.0%	9.7%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.7%	0.2%
Some other race alone, not Hispanic or Latino	4.7%	0.6%	0.6%
Two or more races, not Hispanic or Latino	0.0%	6.8%	4.3%
Hispanic or Latino (of any race)	6.4%	14.4%	19.3%

Where ZIP 98603 is

State: Washington
Main county: Cowlitz County
Land area: 114.73 sq mi· about 11 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 Cowlitz County

98581 Cowlitz County, WA 98611 Cowlitz County, WA 98625 Cowlitz County, WA 98626 Cowlitz County, WA 98632 Cowlitz County, WA 98645 Cowlitz County, WA 98649 Cowlitz County, WA 98674 Cowlitz County, WA

See every ZIP code in Washington, or compare ZIP 98603 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.