Saint John ZIP Codes — Whitman County, WA

There is one unique ZIP code in Saint John, Washington and it is 99171. Area code: 509.

ZIP codes

250.28

sq mi land

3.71

sq mi water

509

area code

Saint John, WA ZIP code map

About Saint John, WA

Saint John is a charming small town located in the state of Washington, known for its picturesque landscapes and close-knit community. Positioned within Whitman County, this quaint locale offers a peaceful lifestyle away from the hustle and bustle of larger cities. With its unique character and rural charm, Saint John is a wonderful place for those seeking tranquility and a slower pace of life.

Location & geography

Saint John is located in the eastern part of Washington, surrounded by scenic landscapes and agricultural land. The town is situated near several other cities, including Colfax, which is approximately 18 miles to the west, and Pullman, about 26 miles to the south. The area encompasses a land area of 250.28 square miles, with a water area of 3.71 square miles, making it a spacious locale with ample outdoor opportunities.

Community & economy

The character of Saint John is defined by its friendly residents and strong sense of community. Local industries primarily revolve around agriculture, with many residents engaged in farming and related activities. Daily life in Saint John is marked by community events, outdoor activities, and a close connection to the natural environment.

Transportation

Transportation in and around Saint John is facilitated by Washington State Route 23, which provides access to neighboring towns and larger highways. The nearest major airport is Pullman-Moscow Regional Airport, located approximately 26 miles south of the city. Public transit options are limited due to the small population, making personal vehicles the primary mode of transportation.

History

Saint John was founded in the late 19th century, primarily developed as a farming community amidst the fertile lands of Whitman County. The town initially thrived due to agriculture, which remains a significant aspect of its economy today. Over the years, Saint John has hosted various local events that celebrate its rich agricultural heritage and community spirit.

Did you know?

A little-known fact about Saint John is that it serves as a vital agricultural hub in the region due to its fertile soil and favorable growing conditions. Additionally, the town maintains a small-town charm that is becoming increasingly rare in today’s fast-paced world.

ZIP codes for Saint John, WA (1)

ZIP code	City	County	Map
99171	Saint John	Whitman	View map

Demographics & statistics

969

Population

55.5

Median age

$68,269

Median household income

$31,249

Per capita income

$209,600

Median home value

$903

Median monthly rent

73.0%

Home ownership

10.5%

Poverty rate

5.1%

Unemployment

383

Housing units

29.6%

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	158	16.3%
18 and over	811	83.7%
65 and over	320	33.0%
Median age	55.5 years

Race & ethnicity

White 93.7%

Black or African American 3.4%

Two or more races 2.1%

Asian 0.4%

Hispanic or Latino 0.2%

American Indian / Alaska Native 0.2%

Group	Count	%
White	910	93.7%
Black or African American	33	3.4%
Two or more races	20	2.1%
Asian	4	0.4%
Hispanic or Latino	2	0.2%
American Indian / Alaska Native	2	0.2%

Household income

Under $10k 6.2%

$10k–$15k 1.4%

$15k–$25k 13.6%

$25k–$35k 6.7%

$35k–$50k 9.1%

$50k–$75k 20.6%

$75k–$100k 16.5%

$100k–$150k 20.1%

$150k–$200k 4.3%

$200k+ 1.4%

Range	% of households
Under $10k	6.2%
$10k–$15k	1.4%
$15k–$25k	13.6%
$25k–$35k	6.7%
$35k–$50k	9.1%
$50k–$75k	20.6%
$75k–$100k	16.5%
$100k–$150k	20.1%
$150k–$200k	4.3%
$200k+	1.4%
Median income	$68,269

Housing

Home values

Under $50k 5.6%

$50k–$100k 12.8%

$100k–$150k 15.4%

$150k–$200k 10.8%

$200k–$300k 35.7%

$300k–$500k 13.8%

$500k–$1M 4.9%

$1M+ 1.0%

Housing overview

Metric	Value
Median home value	$209,600
Median rent / month	$903
Owner occupied	73.0%
Renter occupied	27.0%
Vacant	15.7%
Single-family detached	84.1%
Large apartment buildings	1.2%
Mobile homes	7.7%
Median rooms	6.5
Avg household size (owned)	2.44

Year built

Era	%
2020 or later	0.0%
2010–2019	0.4%
2000–2009	5.2%
1990–1999	10.1%
1980–1989	8.9%
1970–1979	13.3%
1960–1969	4.0%
1950–1959	10.5%
1940–1949	17.9%
1939 or earlier	29.6%

Bedrooms

Size	% of units
No bedroom (studio)	2.2%
1 bedroom	5.0%
2 bedrooms	28.0%
3 bedrooms	38.9%
4 bedrooms	14.3%
5+ bedrooms	11.5%

Vehicles per household

Vehicles	% of households
No vehicle	7.2%
1 vehicle	22.5%
2 vehicles	37.1%
3 or more	33.3%

Heating fuel

Fuel type	%
Utility gas	33.3%
Electricity	47.4%
Propane / LP gas	6.7%
Fuel oil	6.0%
Wood	5.5%

Households & families

Household type	Count	%
Married-couple family	213	51.0%
Cohabiting couple	27	6.5%
Male householder, no spouse	76	18.2%
Female householder, no spouse	102	24.4%
Households with children under 18	68	16.3%
Households with seniors (65+)	221	52.9%
Average household size	2.32

Marital status

Status	Male	Female
Never married	27.3%	6.3%
Married	55.9%	54.5%
Separated	0.0%	1.9%
Widowed	2.2%	13.4%
Divorced	14.6%	23.9%

Education

Less than 9th grade 5.6%

Some HS, no diploma 13.8%

HS graduate 16.6%

Some college, no degree 23.7%

Associate's degree 10.8%

Bachelor's degree 23.8%

Graduate / professional 5.7%

Metric	%
HS diploma or higher	80.6%
Bachelor's or higher	29.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	14	9.9%
Kindergarten	11	7.7%
Elementary school	56	39.4%
High school	33	23.2%
College / grad school	28	19.7%

Employment

Industry of employment

Education & healthcare 34.8%

Agriculture & mining 23.8%

Manufacturing 7.1%

Construction 6.5%

Retail trade 4.8%

Public administration 4.5%

Professional & management 4.2%

Finance & real estate 3.6%

Wholesale trade 3.0%

Transportation & utilities 3.0%

Information 2.4%

Other services 2.1%

Arts, food & hospitality 0.3%

Occupation

Category	%
Management, business & arts	56.0%
Service	10.7%
Sales & office	11.0%
Natural resources & construction	16.1%
Production & transportation	6.3%

Employment type

Type	%
Private sector	63.4%
Government	28.3%
Self-employed	8.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	65.8%
Carpool	11.2%
Public transit	0.0%
Walk	10.0%
Other means	0.6%
Avg commute (minutes)	23.9

Poverty

All people 10.5%

Under 18 years 9.5%

18 and over 10.7%

Married-couple families 3.8%

Female-led households 14.0%

Income support

Source	% of households
Social Security	47.8%
Retirement income	34.7%
Supplemental Security	7.2%
Cash public assistance	6.0%
Food stamps / SNAP	13.4%

Health indicators

Condition	%
High blood pressure	38.2%
High cholesterol	37.4%
Heart disease	9.3%
Stroke	4.3%
Asthma	10.9%
Arthritis	32.0%
Kidney disease	4.0%
Pulmonary disease	8.9%
Cancer	9.5%

Behavior / access	%
Binge drinking	14.8%
No physical activity	21.7%
Less than 7 hrs sleep	27.6%
Fair or poor health	16.7%
Poor mental health	14.3%
Poor physical health	12.9%
No health insurance	9.9%
Visited doctor (checkup)	73.3%
Visited dentist	67.7%
Cholesterol screening	90.5%
Teeth loss	13.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	85	10.6%

Disability	%
Any disability	25.9%
Under 18	0.0%
18–64 years	25.8%
65 and over	38.8%

Health insurance coverage

Type	%
Private insurance	68.4%
Public insurance	49.3%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	919	94.8%
Spanish	4	0.4%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	4	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	954	98.5%
Born in same state	943	97.3%
Born in different state	641	66.2%
Foreign born	11	1.1%
Naturalized citizen	15	1.5%
Not a US citizen	7	46.7%

Ancestry

Ancestry	Count	%
Italian	161	16.6%
French	104	10.7%
Polish	21	2.2%
Arab	21	2.2%

Ancestry	Count	%
English	5	0.5%
German	3	0.3%
Dutch	3	0.3%

Technology access

Metric	% of households
Computer access	43.1%
Internet access	80.9%

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

Frequently asked questions

What ZIP codes does Saint John, WA have?

Saint John, WA has one ZIP code: 99171. Each ZIP code serves a distinct delivery area within the city and surrounding region.