99158 ZIP Code — Oakesdale, WA

Whitman County, Washington

ZIP code 99158 is located in Oakesdale, Washington, within Whitman County. It covers approximately 94.83 square miles and serves a population of 619 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 509.

About ZIP code 99158

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 $195,500. Owner-occupancy is high at 82%, well above the national average.

Median household income is $67,375. The poverty rate of 6% is below the national average. 38% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 28 minutes is near the national average.

Educational attainment is near the national average, with 28% of residents holding a bachelor's degree or higher.

Overall, ZIP code 99158 reflects a community defined by high homeownership and a significant Social Security-dependent population.

619

population

94.83

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

99158 ZIP code map

Cities in ZIP code 99158

Below are the cities the US Postal Service accepts for ZIP code 99158. Using any city not on this list may result in mail delivery delays.

City	Status
Oakesdale	Preferred

Nearby ZIP codes

99104 Belmont (5 mi) 99128 Farmington (6.7 mi) 99130 Garfield (8.7 mi) 99033 Tekoa (10.9 mi) 99170 Rosalia (12.3 mi) 99018 Latah (13.8 mi) 99161 Palouse (15.6 mi) 83824 Desmet (16.8 mi) 99171 Saint John (17 mi) 83855 Potlatch (18.1 mi) 99111 Colfax (18.7 mi) 83870 Tensed (19.5 mi)

Demographics updated 05/2026

Population
Total population	619
Population density	7 / sq mi
State FIPS	53
County FIPS	075

Geography
Land area	94.83 sq mi
Water area	0.00 sq mi
Latitude	47.1062
Longitude	-117.2652
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	41.4%	55.9%	31.7%
$50k – $100k	38.6%	24.5%	30.6%
$100k – $200k	16.4%	15.6%	27.1%
Over $200k	3.6%	4.0%	10.6%

Demographics & statistics

619

Population

People per sq mi

49.6

Median age

$67,375

Median household income

$31,329

Per capita income

$195,500

Median home value

$694

Median monthly rent

81.7%

Home ownership

6.3%

Poverty rate

3.4%

Unemployment

236

Housing units

27.9%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	146	23.6%
18 and over	473	76.4%
65 and over	139	22.5%
Median age	49.6 years

Race & ethnicity

White 82.3%

Two or more races 10.4%

Hispanic or Latino 4.9%

Black or African American 2.3%

Group	Count	%
White	536	82.3%
Two or more races	68	10.4%
Hispanic or Latino	32	4.9%
Black or African American	15	2.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	41.4%	55.9%	31.7%
$50k – $100k	38.6%	24.5%	30.6%
$100k – $200k	16.4%	15.6%	27.1%
Over $200k	3.6%	4.0%	10.6%

Under $10k 3.8%

$10k–$15k 2.6%

$15k–$25k 5.1%

$25k–$35k 7.2%

$35k–$50k 12.8%

$50k–$75k 26.4%

$75k–$100k 14.5%

$100k–$150k 16.2%

$150k–$200k 6.8%

$200k+ 4.7%

Range	% of households
Under $10k	3.8%
$10k–$15k	2.6%
$15k–$25k	5.1%
$25k–$35k	7.2%
$35k–$50k	12.8%
$50k–$75k	26.4%
$75k–$100k	14.5%
$100k–$150k	16.2%
$150k–$200k	6.8%
$200k+	4.7%
Median income	$67,375

Housing

Home values

Under $50k 2.1%

$50k–$100k 18.8%

$100k–$150k 15.1%

$150k–$200k 15.1%

$200k–$300k 17.7%

$300k–$500k 26.6%

$500k–$1M 4.7%

Housing overview

Metric	Value
Median home value	$195,500
Median rent / month	$694
Owner occupied	81.7%
Renter occupied	18.3%
Vacant	15.8%
Single-family detached	89.6%
Large apartment buildings	0.0%
Mobile homes	7.2%
Median rooms	6.8
Avg household size (owned)	2.59

Year built

Era	%
2020 or later	0.0%
2010–2019	1.4%
2000–2009	4.7%
1990–1999	7.5%
1980–1989	8.2%
1970–1979	6.8%
1960–1969	3.2%
1950–1959	7.5%
1940–1949	11.1%
1939 or earlier	49.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.2%
2 bedrooms	16.5%
3 bedrooms	45.9%
4 bedrooms	22.6%
5+ bedrooms	12.9%

Vehicles per household

Vehicles	% of households
No vehicle	0.4%
1 vehicle	19.6%
2 vehicles	32.3%
3 or more	47.7%

Heating fuel

Fuel type	%
Electricity	59.1%
Propane / LP gas	2.1%
Fuel oil	23.4%
Wood	9.8%

Households & families

Household type	Count	%
Married-couple family	165	70.2%
Cohabiting couple	6	2.6%
Male householder, no spouse	24	10.2%
Female householder, no spouse	40	17.0%
Households with children under 18	65	27.7%
Households with seniors (65+)	98	41.7%
Average household size	2.63

Marital status

Status	Male	Female
Never married	17.8%	18.2%
Married	71.1%	62.9%
Separated	0.0%	3.0%
Widowed	4.5%	4.9%
Divorced	6.6%	11.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 7.4%

HS graduate 17.4%

Some college, no degree 29.5%

Associate's degree 17.7%

Bachelor's degree 21.2%

Graduate / professional 6.7%

Metric	%
HS diploma or higher	92.6%
Bachelor's or higher	27.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	5	2.9%
Kindergarten	4	2.3%
Elementary school	93	54.1%
High school	33	19.2%
College / grad school	37	21.5%

Employment

Industry of employment

Education & healthcare 38.1%

Agriculture & mining 17.1%

Wholesale trade 10.9%

Retail trade 7.4%

Construction 5.1%

Professional & management 5.1%

Public administration 5.1%

Transportation & utilities 3.5%

Finance & real estate 3.5%

Other services 1.9%

Manufacturing 0.8%

Information 0.8%

Arts, food & hospitality 0.8%

Occupation

Category	%
Management, business & arts	44.4%
Service	12.5%
Sales & office	17.1%
Natural resources & construction	15.2%
Production & transportation	10.9%

Employment type

Type	%
Private sector	63.4%
Government	29.6%
Self-employed	7.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	77.2%
Carpool	6.4%
Public transit	0.4%
Walk	5.6%
Work from home	8.8%
Other means	1.6%
Avg commute (minutes)	28.4

Poverty

All people 6.3%

Under 18 years 3.5%

18 and over 7.2%

Married-couple families 3.6%

Female-led households 16.7%

Income support

Source	% of households
Social Security	38.3%
Retirement income	23.0%
Supplemental Security	3.8%
Cash public assistance	6.4%
Food stamps / SNAP	5.1%

Health indicators

Condition	%
Obesity	30.8%
High blood pressure	33.3%
High cholesterol	35.6%
Diabetes	9.1%
Heart disease	7.0%
Stroke	3.2%
Asthma	10.5%
Arthritis	27.7%
Kidney disease	3.1%
Pulmonary disease	6.7%
Cancer	8.5%

Behavior / access	%
Smoking	13.5%
Binge drinking	16.4%
No physical activity	17.3%
Less than 7 hrs sleep	26.7%
Depression	25.7%
Fair or poor health	12.6%
Poor mental health	13.9%
Poor physical health	10.5%
No health insurance	8.0%
Visited doctor (checkup)	71.9%
Visited dentist	73.3%
Cholesterol screening	90.8%
Teeth loss	9.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	51	10.8%

Disability	%
Any disability	14.4%
Under 18	2.7%
18–64 years	12.3%
65 and over	31.7%

Health insurance coverage

Type	%
Private insurance	75.3%
Public insurance	33.6%
No insurance	4.4%
Uninsured under 19	6.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	606	97.9%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	615	99.4%
Born in same state	610	98.5%
Born in different state	358	57.8%
Foreign born	5	0.8%
Naturalized citizen	4	0.6%
Not a US citizen	4	100.0%

Ancestry

Ancestry	Count	%
French	119	19.2%
Arab	97	15.7%
Italian	85	13.7%
Polish	14	2.3%

Ancestry	Count	%
English	10	1.6%
German	5	0.8%
Dutch	4	0.6%

Technology access

Metric	% of households
Computer access	38.0%
Internet access	84.3%

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

Frequently asked questions about ZIP code 99158

What city is ZIP code 99158 in?

ZIP code 99158 is primarily assigned to Oakesdale, Washington.

What county is ZIP code 99158 in?

ZIP code 99158 falls within Whitman County, Washington.

Is ZIP code 99158 mostly owner-occupied?

82% of occupied units in ZIP code 99158 are owner-occupied, well above the national average.

Does ZIP code 99158 have a large retiree population?

38% of households in ZIP code 99158 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 99158 have a large veteran population?

11% of civilians in ZIP code 99158 are veterans, above the national average of ~7%.

What is the population of ZIP code 99158?

ZIP code 99158 has an estimated population of 619 residents, with a density of 7 people per square mile.

What timezone is ZIP code 99158 in?

ZIP code 99158 observes the PST timezone.