Data Last Updated: July 1, 2025

Grant County, WA ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Grant, WA.	18 ZIP Codes (13 General, 3 PO Box, 0 Unique, & 2 Multi County) [More Details]
Area Code: The Telephone Area Code that are associated with Grant, WA. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	509
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Pacific
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Grant, WA from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	99,123 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	53025
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Moses Lake, WA
Land Area: The approximate amount of land area covered by Grant, WA in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	2,680 square miles
Water Area: The approximate amount of water area covered by Grant, WA in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	112 square miles
Coordinates: The latitude/longitude centroid coordinates for Grant County, WA.	-119.451754, 47.205683
Quick Link: Copy the direct link to the Grant, WACounty page and use anywhere you like!	https://www.zip-codes.com/county/wa-grant.asp

Grant, WA ZIP Code Boundaries

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Grant County, WA Covers 18 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 98823	General	Ephrata	12,393	12.50%
ZIP Code 98824	P.O. Box	George	160	0.16%
ZIP Code 98832	General	Marlin	349	0.35%
ZIP Code 98837	General	Moses Lake	46,262	46.67%
ZIP Code 98848	General	Quincy	13,392	13.51%
ZIP Code 98851	General	Soap Lake	4,472	4.51%
ZIP Code 98853	P.O. Box	Stratford	79	0.08%
ZIP Code 98857	General	Warden	3,999	4.03%
ZIP Code 98860	P.O. Box	Wilson Creek	259	0.26%
ZIP Code 99103 *	General	Almira	495	--
ZIP Code 99115	General	Coulee City	1,227	1.24%
ZIP Code 99123	General	Electric City	1,063	1.07%
ZIP Code 99133	General	Grand Coulee	1,476	1.49%
ZIP Code 99135	General	Hartline	288	0.29%
ZIP Code 99321	General	Beverly	669	0.67%
ZIP Code 99344 *	General	Othello	18,948	--
ZIP Code 99349	General	Mattawa	7,960	8.03%
ZIP Code 99357	General	Royal City	4,240	4.28%

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Grant, WA, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Grant, WA Information

Grant County, WA Covers 18 ZIP Codes. This includes 13 General ZIP Codes, 3 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There are also 2 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Grant County.

The population for Grant County is 99,123, according to the U.S. Census. Population Density is 36.99 persons per square mile. With 38,635 Housing Units, the Average Household Size is 2.84 persons. There are 34,078 Family Households with an Average Family Size of 3.04 persons. 12.10% of the population is without Health Insurance. The 58.63% Employment Rate is 1.17% above the national average of 59.8%.61,989 people aged 25+ have some educational achievement, with 18.16% (or 11,260 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

509 is the only area code for this area. Grant is also located in the Pacific timezone and the current local time is shown above.

Grant is part of the Moses Lake, WA Core Based Statistical Area (CBSA). Its CBSA Code is 34180.It is classified as a micro area, which means it has an urban core of at least 10,000 but less then 50,000 people.

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Grant, WA have 33,704 Residential mailboxes and 1,758 Business mailboxes.There are 2,088 businesses with a total of 24,302 employees. That is an average of 11.6 employees per business. Annual payroll for these businesses is $1,218,442,000. Other Demographics

Grant County Demographic Profile

Population & People

Total Population

99,123

Income

Median Household Income

$71,115

Housing

Total Housing Units

38,635

Health

Without Healthcare Coverage

12.10%

Business & Economy

Total Businesses

2,088

Families

Total Households

34,078

Employment

Employment Rate

58.63%

Education

Bachelor's Degree or Higher

18.16%

Total Population: Total number of people from the 2020 U.S. Census for Grant, WA. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	99,123
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Grant, WA. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	95,916
Total Households: Total number of Households from the 2020 U.S. Census for Grant, WA. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	34,078
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	38,635
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.84
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.04

Other Grant Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	33,704
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	1,758
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	47,255
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	20,674
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	1,055

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	2,088
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$272,532,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$1,218,442,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	24,302

Sum of all ZIP Codes assigned Grant, WA as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov