98858 ZIP Code — Waterville, WA

Douglas County, Washington

ZIP code 98858 is located in Waterville, Washington, within Douglas County. It covers approximately 367.06 square miles and serves a population of 1,850 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 509.

About ZIP code 98858

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $232,100. Owner-occupancy sits near the national average at 75%.

Median household income is $70,408. The poverty rate of 6% is below the national average.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. The average commute of 27 minutes is near the national average.

College attainment at 16% is below the national average, consistent with a trades and production-oriented local economy.

16% of residents lack health insurance, above the national average.

Notable community characteristics include disability rates above the national average at 25%.

1,850

population

367.06

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

98858 ZIP code map

Cities in ZIP code 98858

Below are the cities the US Postal Service accepts for ZIP code 98858. Using any city not on this list may result in mail delivery delays.

City	Status
Waterville	Acceptable
Waterville	Preferred

Nearby ZIP codes

98845 Palisades (16.4 mi) 98843 Orondo (17 mi) 99115 Coulee City (19.7 mi) 98851 Soap Lake (19.7 mi)

Demographics updated 05/2026

Population
Total population	1,850
Population density	5 / sq mi
State FIPS	53
County FIPS	017

Geography
Land area	367.06 sq mi
Water area	1.64 sq mi
Latitude	47.6332
Longitude	-119.7208
Timezone	Pacific (PT)
Area code	509

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	36.3%	34.8%	31.7%
$50k – $100k	30.9%	37.2%	30.6%
$100k – $200k	30.3%	21.6%	27.1%
Over $200k	2.5%	6.3%	10.6%

Demographics & statistics

1,850

Population

People per sq mi

51.5

Median age

$70,408

Median household income

$38,008

Per capita income

$232,100

Median home value

$1,208

Median monthly rent

74.5%

Home ownership

6.3%

Poverty rate

1.7%

Unemployment

685

Housing units

15.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

116

25–34

118

35–44

144

45–54

116

123

55–59

115

60–64

145

65–74

117

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	290	15.7%
18 and over	1,560	84.3%
65 and over	335	18.1%
Median age	51.5 years

Race & ethnicity

White 75.8%

Hispanic or Latino 8.8%

Other race 8.6%

Two or more races 3.7%

American Indian / Alaska Native 2.6%

Asian 0.3%

Black or African American 0.1%

Group	Count	%
White	1,538	75.8%
Hispanic or Latino	178	8.8%
Other race	174	8.6%
Two or more races	76	3.7%
American Indian / Alaska Native	52	2.6%
Asian	7	0.3%
Black or African American	3	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	36.3%	34.8%	31.7%
$50k – $100k	30.9%	37.2%	30.6%
$100k – $200k	30.3%	21.6%	27.1%
Over $200k	2.5%	6.3%	10.6%

Under $10k 3.1%

$10k–$15k 0.9%

$15k–$25k 9.4%

$25k–$35k 3.3%

$35k–$50k 15.6%

$50k–$75k 23.7%

$75k–$100k 13.8%

$100k–$150k 17.7%

$150k–$200k 5.5%

$200k+ 7.0%

Range	% of households
Under $10k	3.1%
$10k–$15k	0.9%
$15k–$25k	9.4%
$25k–$35k	3.3%
$35k–$50k	15.6%
$50k–$75k	23.7%
$75k–$100k	13.8%
$100k–$150k	17.7%
$150k–$200k	5.5%
$200k+	7.0%
Median income	$70,408

Housing

Home values

Under $50k 1.1%

$50k–$100k 0.7%

$100k–$150k 10.9%

$150k–$200k 21.6%

$200k–$300k 44.8%

$300k–$500k 13.9%

$500k–$1M 7.0%

Housing overview

Metric	Value
Median home value	$232,100
Median rent / month	$1,208
Owner occupied	74.5%
Renter occupied	25.5%
Vacant	14.3%
Single-family detached	89.5%
Large apartment buildings	0.1%
Mobile homes	9.2%
Median rooms	6.0
Avg household size (owned)	2.47

Year built

Era	%
2020 or later	0.0%
2010–2019	1.5%
2000–2009	4.3%
1990–1999	6.0%
1980–1989	4.6%
1970–1979	5.5%
1960–1969	2.6%
1950–1959	7.2%
1940–1949	12.9%
1939 or earlier	55.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	3.5%
2 bedrooms	11.2%
3 bedrooms	43.9%
4 bedrooms	32.2%
5+ bedrooms	9.2%

Vehicles per household

Vehicles	% of households
No vehicle	3.1%
1 vehicle	10.4%
2 vehicles	39.6%
3 or more	46.9%

Heating fuel

Fuel type	%
Utility gas	1.7%
Electricity	95.2%
Wood	3.1%

Households & families

Household type	Count	%
Married-couple family	430	57.2%
Cohabiting couple	85	11.3%
Male householder, no spouse	148	19.7%
Female householder, no spouse	89	11.8%
Households with children under 18	183	24.3%
Households with seniors (65+)	208	27.7%
Average household size	2.44

Marital status

Status	Male	Female
Never married	26.7%	23.9%
Married	60.2%	61.8%
Separated	0.0%	0.0%
Widowed	2.8%	6.5%
Divorced	10.4%	7.8%

Education

Less than 9th grade 5.2%

Some HS, no diploma 10.8%

HS graduate 35.3%

Some college, no degree 17.9%

Associate's degree 15.0%

Bachelor's degree 12.1%

Graduate / professional 3.7%

Metric	%
HS diploma or higher	84.0%
Bachelor's or higher	15.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	4	1.6%
Kindergarten	4	1.6%
Elementary school	127	49.4%
High school	69	26.8%
College / grad school	53	20.6%

Employment

Industry of employment

Agriculture & mining 20.4%

Education & healthcare 18.9%

Manufacturing 13.9%

Retail trade 12.7%

Construction 9.7%

Public administration 5.8%

Transportation & utilities 5.5%

Arts, food & hospitality 3.6%

Finance & real estate 3.3%

Information 2.2%

Wholesale trade 2.0%

Professional & management 1.4%

Other services 0.6%

Occupation

Category	%
Management, business & arts	29.3%
Service	8.4%
Sales & office	21.1%
Natural resources & construction	22.9%
Production & transportation	18.3%

Employment type

Type	%
Private sector	76.9%
Government	18.1%
Self-employed	4.6%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	73.9%
Carpool	9.2%
Public transit	0.0%
Walk	2.5%
Work from home	13.0%
Other means	1.4%
Avg commute (minutes)	27.1

Poverty

All people 6.3%

Under 18 years 3.1%

18 and over 6.9%

Married-couple families 0.7%

Female-led households 34.1%

Income support

Source	% of households
Social Security	29.7%
Retirement income	18.0%
Supplemental Security	4.0%
Cash public assistance	2.0%
Food stamps / SNAP	8.4%

Health indicators

Condition	%
Obesity	31.4%
High blood pressure	34.2%
High cholesterol	38.9%
Diabetes	10.1%
Heart disease	7.4%
Stroke	3.5%
Asthma	10.4%
Arthritis	29.2%
Kidney disease	3.3%
Pulmonary disease	7.5%
Cancer	8.2%

Behavior / access	%
Smoking	15.9%
Binge drinking	15.6%
No physical activity	20.0%
Less than 7 hrs sleep	29.7%
Depression	26.2%
Fair or poor health	14.8%
Poor mental health	14.4%
Poor physical health	11.8%
No health insurance	11.1%
Visited doctor (checkup)	71.3%
Visited dentist	65.3%
Cholesterol screening	89.2%
Teeth loss	12.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	114	7.3%

Disability	%
Any disability	24.8%
Under 18	6.2%
18–64 years	28.1%
65 and over	29.0%

Health insurance coverage

Type	%
Private insurance	63.0%
Public insurance	33.4%
No insurance	16.2%
Uninsured under 19	9.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,764	95.4%
Spanish	106	6.0%
Other Indo-European	106	6.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,724	93.2%
Born in same state	1,707	92.3%
Born in different state	1,282	69.3%
Foreign born	17	0.9%
Naturalized citizen	126	6.8%
Not a US citizen	9	7.1%

Ancestry

Ancestry	Count	%
French	235	12.7%
Polish	160	8.6%
Italian	130	7%
English	49	2.6%

Ancestry	Count	%
Arab	42	2.3%
Irish	25	1.4%
Dutch	19	1%

Technology access

Metric	% of households
Computer access	40.6%
Internet access	96.0%

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

Frequently asked questions about ZIP code 98858

What city is ZIP code 98858 in?

ZIP code 98858 is primarily assigned to Waterville, Washington.

What county is ZIP code 98858 in?

ZIP code 98858 falls within Douglas County, Washington.

What is the population of ZIP code 98858?

ZIP code 98858 has an estimated population of 1,850 residents, with a density of 5 people per square mile.

What is the typical home value in ZIP code 98858?

The median home value in ZIP code 98858 is $232,100.

What is the median household income in ZIP code 98858?

The median household income in ZIP code 98858 is $70,408, below the national median of ~$75,000.

What timezone is ZIP code 98858 in?

ZIP code 98858 observes the PST timezone.