Rock Island ZIP Codes — Douglas County, WA

There is one unique ZIP code in Rock Island, Washington and it is 98850. Area code: 509.

ZIP codes

76.25

sq mi land

2.90

sq mi water

509

area code

Rock Island, WA ZIP code map

About Rock Island, WA

Rock Island, Washington, is a small city located in Douglas County. This serene community is known for its close-knit atmosphere and access to stunning natural landscapes. With a unique blend of agricultural heritage and modern amenities, Rock Island serves as a charming destination for those seeking a quieter lifestyle.

Location & geography

Rock Island is situated in north-central Washington, surrounded by the beauty of the Pacific Northwest. Nearby cities include East Wenatchee, approximately 8 miles to the southeast, Wenatchee, about 11 miles to the southwest, Quincy, roughly 17 miles to the north, and Brewster, which is around 24 miles away. The city covers a diverse terrain with a land area of 76.25 square miles and a water area of 2.90 square miles, featuring both rural landscapes and proximity to the Columbia River.

Community & economy

The character of Rock Island is defined by its agricultural roots and community-focused lifestyle, making it a welcoming place for families and individuals alike. The local economy is primarily driven by agriculture and small businesses, with residents enjoying a mix of rural living and convenient access to nearby larger cities. Daily life in Rock Island often revolves around community events, outdoor activities, and appreciation for the area's natural beauty.

Transportation

Rock Island is conveniently located near major highways, including Washington State Route 28 and U.S. Route 2, providing residents easy access to surrounding areas. The nearest airport is Pangborn Memorial Airport, located about 14 miles to the southwest in East Wenatchee, accommodating both commercial flights and private aviation. Public transportation options are limited in this small city, making personal vehicles the most common means of transport.

History

Rock Island was founded in the early 20th century as part of the region's agricultural expansion. Key industries have historically included farming and fruit production, which remain vital to the local economy today. Throughout its history, Rock Island has seen various developments and changes, yet it has maintained its small-town charm.

Did you know?

One surprising fact about Rock Island is that it is home to the Rock Island Dam, a crucial site that contributes to hydroelectric power generation in the region. This dam not only supports local energy needs but also enhances recreational opportunities along the Columbia River.

ZIP codes for Rock Island, WA (1)

ZIP code	City	County	Map
98850	Rock Island	Douglas	View map

Demographics & statistics

1,749

Population

31.3

Median age

$61,389

Median household income

$21,559

Per capita income

$252,500

Median home value

$863

Median monthly rent

80.6%

Home ownership

8.6%

Poverty rate

5.5%

Unemployment

500

Housing units

5.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

104

5–9

10–14

15–19

20–24

120

25–34

153

35–44

116

45–54

119

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	506	28.9%
18 and over	1,243	71.1%
65 and over	224	12.8%
Median age	31.3 years

Race & ethnicity

White 41.5%

Hispanic or Latino 28%

Other race 25.2%

Two or more races 4.2%

Black or African American 1%

American Indian / Alaska Native 0.1%

Group	Count	%
White	1,007	41.5%
Hispanic or Latino	680	28%
Other race	611	25.2%
Two or more races	103	4.2%
Black or African American	25	1%
American Indian / Alaska Native	3	0.1%

Household income

Under $10k 1.4%

$10k–$15k 1.6%

$15k–$25k 8.5%

$25k–$35k 11.9%

$35k–$50k 17.8%

$50k–$75k 18.3%

$75k–$100k 30.4%

$100k–$150k 8.5%

$150k–$200k 1.2%

$200k+ 0.3%

Range	% of households
Under $10k	1.4%
$10k–$15k	1.6%
$15k–$25k	8.5%
$25k–$35k	11.9%
$35k–$50k	17.8%
$50k–$75k	18.3%
$75k–$100k	30.4%
$100k–$150k	8.5%
$150k–$200k	1.2%
$200k+	0.3%
Median income	$61,389

Housing

Home values

Under $50k 6.9%

$50k–$100k 10.1%

$100k–$150k 6.0%

$150k–$200k 8.6%

$200k–$300k 26.6%

$300k–$500k 22.1%

$500k–$1M 19.7%

Housing overview

Metric	Value
Median home value	$252,500
Median rent / month	$863
Owner occupied	80.6%
Renter occupied	19.4%
Vacant	5.6%
Single-family detached	56.0%
Large apartment buildings	0.0%
Mobile homes	38.1%
Median rooms	5.1
Avg household size (owned)	2.92

Year built

Era	%
2020 or later	0.0%
2010–2019	9.6%
2000–2009	4.9%
1990–1999	15.8%
1980–1989	16.0%
1970–1979	24.7%
1960–1969	12.7%
1950–1959	11.8%
1940–1949	1.1%
1939 or earlier	3.3%

Bedrooms

Size	% of units
No bedroom (studio)	1.8%
1 bedroom	4.7%
2 bedrooms	21.4%
3 bedrooms	65.2%
4 bedrooms	6.4%
5+ bedrooms	0.5%

Vehicles per household

Vehicles	% of households
No vehicle	1.7%
1 vehicle	17.1%
2 vehicles	40.0%
3 or more	41.2%

Heating fuel

Fuel type	%
Utility gas	3.1%
Electricity	96.5%
Wood	0.3%

Households & families

Household type	Count	%
Married-couple family	330	57.1%
Cohabiting couple	48	8.3%
Male householder, no spouse	68	11.8%
Female householder, no spouse	132	22.8%
Households with children under 18	290	50.2%
Households with seniors (65+)	184	31.8%
Average household size	3.01

Marital status

Status	Male	Female
Never married	34.7%	28.4%
Married	50.4%	48.7%
Separated	0.7%	5.6%
Widowed	1.5%	8.1%
Divorced	12.7%	9.2%

Education

Less than 9th grade 21.4%

Some HS, no diploma 12.8%

HS graduate 27.2%

Some college, no degree 22.7%

Associate's degree 10.0%

Bachelor's degree 3.4%

Graduate / professional 2.4%

Metric	%
HS diploma or higher	65.8%
Bachelor's or higher	5.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	61	14.2%
Kindergarten	11	2.6%
Elementary school	178	41.5%
High school	148	34.5%
College / grad school	31	7.2%

Employment

Industry of employment

Agriculture & mining 21.7%

Education & healthcare 16.6%

Professional & management 12.4%

Transportation & utilities 12.0%

Manufacturing 7.6%

Other services 7.3%

Construction 6.0%

Arts, food & hospitality 5.5%

Retail trade 4.8%

Wholesale trade 2.7%

Public administration 2.7%

Finance & real estate 0.6%

Occupation

Category	%
Management, business & arts	13.0%
Service	23.1%
Sales & office	14.6%
Natural resources & construction	27.6%
Production & transportation	21.7%

Employment type

Type	%
Private sector	82.1%
Government	10.9%
Self-employed	7.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	84.9%
Carpool	3.6%
Public transit	0.0%
Walk	6.5%
Other means	1.6%
Avg commute (minutes)	25.8

Poverty

All people 8.6%

Under 18 years 8.7%

18 and over 8.6%

Married-couple families 4.2%

Female-led households 22.1%

Income support

Source	% of households
Social Security	39.1%
Retirement income	13.8%
Supplemental Security	9.2%
Cash public assistance	3.6%
Food stamps / SNAP	18.9%

Health indicators

Condition	%
High blood pressure	30.9%
High cholesterol	32.1%
Heart disease	6.5%
Stroke	3.1%
Asthma	10.2%
Arthritis	24.7%
Kidney disease	3.0%
Pulmonary disease	6.6%
Cancer	6.5%

Behavior / access	%
Binge drinking	16.0%
No physical activity	22.3%
Less than 7 hrs sleep	30.4%
Fair or poor health	16.2%
Poor mental health	14.8%
Poor physical health	11.5%
No health insurance	18.1%
Visited doctor (checkup)	68.8%
Visited dentist	60.9%
Cholesterol screening	86.5%
Teeth loss	14.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	68	5.5%

Disability	%
Any disability	24.1%
Under 18	8.1%
18–64 years	21.6%
65 and over	71.4%

Health insurance coverage

Type	%
Private insurance	44.3%
Public insurance	46.4%
Uninsured under 19	3.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,563	89.4%
Spanish	289	18.5%
Other Indo-European	287	18.4%
Asian & Pacific Islander	2	0.1%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,384	79.1%
Born in same state	1,364	78.0%
Born in different state	1,035	59.2%
Foreign born	20	1.1%
Naturalized citizen	365	20.9%
Not a US citizen	94	25.8%

Ancestry

Ancestry	Count	%
Italian	96	5.5%
French	94	5.4%
Arab	72	4.1%
Polish	57	3.3%

Ancestry	Count	%
Dutch	29	1.7%
German	17	1%
English	5	0.3%

Technology access

Metric	% of households
Computer access	33.0%
Internet access	88.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Rock Island, WA have?

Rock Island, WA has one ZIP code: 98850. Each ZIP code serves a distinct delivery area within the city and surrounding region.