Coulee City ZIP Codes — Grant County, WA

There is one unique ZIP code in Coulee City, Washington and it is 99115. Area code: 509.

ZIP codes

420.01

sq mi land

28.77

sq mi water

509

area code

Coulee City, WA ZIP code map

About Coulee City, WA

Coulee City, Washington, is a small city nestled within Grant County. Known for its serene landscapes and recreational opportunities, Coulee City offers residents and visitors a glimpse of rural Washington life. The city is characterized by its close-knit community and access to stunning natural resources.

Location & geography

Located in the north-central part of Washington, Coulee City spans a significant area of 420.01 square miles, complemented by 28.77 square miles of water. It is approximately 18 miles west of the larger city of Grand Coulee and about 37 miles south of the city of Soap Lake. The terrain features rolling hills and proximity to scenic bodies of water, enhancing its appeal for outdoor activities.

Community & economy

The character of Coulee City centers around a friendly and welcoming atmosphere, where residents often know each other by name. The local economy is supported by agriculture, tourism, and recreational activities, which thrive due to the natural beauty of the area. Daily life in Coulee City is calm and peaceful, with opportunities for fishing, boating, and hiking in the surrounding regions.

Transportation

Coulee City is accessible via U.S. Route 2, providing a crucial link to neighboring towns and cities. The nearest major airport is Grant County International Airport, located approximately 30 miles to the west in Moses Lake, offering regional connections.

History

Coulee City was founded during the early 20th century, stemming from agricultural development and the promise of the fertile lands in Grant County. Key industries have historically included farming and tourism, particularly due to the allure of the nearby Grand Coulee Dam. Over the years, the city has hosted various community events that celebrate its rich heritage.

Did you know?

A little-known fact about Coulee City is that it serves as a gateway to the scenic landscapes of the Coulee Corridor, attracting many outdoor enthusiasts. Additionally, the city features several historical landmarks that reflect the area's rich agricultural history.

ZIP codes for Coulee City, WA (1)

ZIP code	City	County	Map
99115	Coulee City	Grant	View map

Demographics & statistics

1,224

Population

48.7

Median age

$46,343

Median household income

$23,710

Per capita income

$146,800

Median home value

$689

Median monthly rent

73.3%

Home ownership

11.6%

Poverty rate

7.4%

Unemployment

873

Housing units

17.1%

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

117

65–74

122

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	250	20.4%
18 and over	974	79.6%
65 and over	377	30.8%
Median age	48.7 years

Race & ethnicity

White 78.8%

Two or more races 10.5%

Hispanic or Latino 5%

American Indian / Alaska Native 2.3%

Black or African American 2.1%

Asian 1.2%

Other race 0.2%

Group	Count	%
White	1,015	78.8%
Two or more races	135	10.5%
Hispanic or Latino	64	5%
American Indian / Alaska Native	29	2.3%
Black or African American	27	2.1%
Asian	15	1.2%
Other race	3	0.2%

Household income

Under $10k 1.0%

$10k–$15k 8.1%

$15k–$25k 16.6%

$25k–$35k 10.6%

$35k–$50k 17.0%

$50k–$75k 26.7%

$75k–$100k 8.1%

$100k–$150k 10.8%

$150k–$200k 0.6%

$200k+ 0.4%

Range	% of households
Under $10k	1.0%
$10k–$15k	8.1%
$15k–$25k	16.6%
$25k–$35k	10.6%
$35k–$50k	17.0%
$50k–$75k	26.7%
$75k–$100k	8.1%
$100k–$150k	10.8%
$150k–$200k	0.6%
$200k+	0.4%
Median income	$46,343

Housing

Home values

Under $50k 10.6%

$50k–$100k 19.5%

$100k–$150k 21.6%

$150k–$200k 14.2%

$200k–$300k 19.5%

$300k–$500k 10.3%

$500k–$1M 4.2%

Housing overview

Metric	Value
Median home value	$146,800
Median rent / month	$689
Owner occupied	73.3%
Renter occupied	26.7%
Vacant	48.9%
Single-family detached	54.2%
Large apartment buildings	0.0%
Mobile homes	42.8%
Median rooms	4.8
Avg household size (owned)	2.13

Year built

Era	%
2020 or later	1.0%
2010–2019	6.9%
2000–2009	15.0%
1990–1999	13.9%
1980–1989	6.7%
1970–1979	14.7%
1960–1969	9.0%
1950–1959	3.3%
1940–1949	5.9%
1939 or earlier	23.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	32.6%
2 bedrooms	25.6%
3 bedrooms	28.9%
4 bedrooms	6.0%
5+ bedrooms	6.8%

Vehicles per household

Vehicles	% of households
No vehicle	7.0%
1 vehicle	23.0%
2 vehicles	43.5%
3 or more	26.5%

Heating fuel

Fuel type	%
Utility gas	4.3%
Electricity	90.9%
Propane / LP gas	3.7%
Fuel oil	1.2%

Households & families

Household type	Count	%
Married-couple family	294	56.9%
Cohabiting couple	16	3.1%
Male householder, no spouse	86	16.6%
Female householder, no spouse	121	23.4%
Households with children under 18	121	23.4%
Households with seniors (65+)	255	49.3%
Average household size	2.37

Marital status

Status	Male	Female
Never married	14.3%	9.4%
Married	66.1%	65.5%
Separated	3.0%	6.4%
Widowed	11.9%	12.4%
Divorced	4.8%	6.2%

Education

Less than 9th grade 2.8%

Some HS, no diploma 7.9%

HS graduate 30.6%

Some college, no degree 26.8%

Associate's degree 14.8%

Bachelor's degree 14.7%

Graduate / professional 2.4%

Metric	%
HS diploma or higher	89.4%
Bachelor's or higher	17.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	4	2.4%
Elementary school	106	63.9%
High school	20	12.0%
College / grad school	36	21.7%

Employment

Industry of employment

Agriculture & mining 31.9%

Education & healthcare 27.1%

Arts, food & hospitality 6.8%

Retail trade 6.5%

Other services 6.0%

Manufacturing 4.5%

Construction 4.3%

Professional & management 4.0%

Transportation & utilities 3.3%

Public administration 3.3%

Wholesale trade 2.3%

Occupation

Category	%
Management, business & arts	25.6%
Service	15.1%
Sales & office	23.1%
Natural resources & construction	30.2%
Production & transportation	6.0%

Employment type

Type	%
Private sector	77.1%
Government	17.3%
Self-employed	5.0%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	75.1%
Carpool	6.0%
Public transit	0.0%
Walk	1.5%
Other means	2.0%
Avg commute (minutes)	23.0

Poverty

All people 11.6%

Under 18 years 1.6%

18 and over 14.2%

Married-couple families 9.9%

Female-led households 53.6%

Income support

Source	% of households
Social Security	54.0%
Retirement income	29.0%
Supplemental Security	8.9%
Cash public assistance	0.0%
Food stamps / SNAP	11.8%

Health indicators

Condition	%
High blood pressure	41.0%
High cholesterol	40.2%
Heart disease	9.1%
Stroke	4.4%
Asthma	11.2%
Arthritis	32.0%
Kidney disease	4.0%
Pulmonary disease	9.3%
Cancer	9.1%

Behavior / access	%
Binge drinking	14.1%
No physical activity	22.1%
Less than 7 hrs sleep	29.0%
Fair or poor health	17.4%
Poor mental health	14.7%
Poor physical health	13.9%
No health insurance	10.5%
Visited doctor (checkup)	73.6%
Visited dentist	65.8%
Cholesterol screening	90.3%
Teeth loss	12.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	69	7.1%

Disability	%
Any disability	21.2%
Under 18	10.4%
18–64 years	18.3%
65 and over	33.2%

Health insurance coverage

Type	%
Private insurance	55.4%
Public insurance	52.1%
Uninsured under 19	0.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,104	90.2%
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)	1,212	99.0%
Born in same state	1,197	97.8%
Born in different state	928	75.8%
Foreign born	15	1.2%
Naturalized citizen	12	1.0%
Not a US citizen	5	41.7%

Ancestry

Ancestry	Count	%
Polish	160	13.1%
Arab	116	9.5%
French	87	7.1%
Italian	86	7%

Ancestry	Count	%
Dutch	46	3.8%
English	41	3.3%
German	3	0.2%

Technology access

Metric	% of households
Computer access	42.2%
Internet access	89.7%

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

Frequently asked questions

What ZIP codes does Coulee City, WA have?

Coulee City, WA has one ZIP code: 99115. Each ZIP code serves a distinct delivery area within the city and surrounding region.