Data Last Updated: July 1, 2025

Washington County, KS ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Washington, KS.	15 ZIP Codes (11 General, 0 PO Box, 0 Unique, & 4 Multi County) [More Details]
Area Code: The Telephone Area Code that are associated with Washington, KS. 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.	785
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.	Central
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 Washington, KS 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.	5,530 [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.	20201
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.	None
Land Area: The approximate amount of land area covered by Washington, KS 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.	895 square miles
Water Area: The approximate amount of water area covered by Washington, KS 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.	4 square miles
Coordinates: The latitude/longitude centroid coordinates for Washington County, KS.	-97.087535, 39.784176
Quick Link: Copy the direct link to the Washington, KSCounty page and use anywhere you like!	https://www.zip-codes.com/county/ks-washington.asp

Washington, KS ZIP Code Boundaries

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Washington County, KS Covers 15 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 66548 *	General	Waterville	926	--
ZIP Code 66933	General	Barnes	353	6.38%
ZIP Code 66937	General	Clifton	752	13.60%
ZIP Code 66938 *	General	Clyde	984	--
ZIP Code 66940 *	General	Cuba	284	--
ZIP Code 66943	General	Greenleaf	519	9.39%
ZIP Code 66944	General	Haddam	232	4.20%
ZIP Code 66945	General	Hanover	1,065	19.26%
ZIP Code 66946	General	Hollenberg	99	1.79%
ZIP Code 66953	General	Linn	633	11.45%
ZIP Code 66955	General	Mahaska	107	1.93%
ZIP Code 66958	General	Morrowville	243	4.39%
ZIP Code 66960 *	General	Narka	157	--
ZIP Code 66962	General	Palmer	296	5.35%
ZIP Code 66968	General	Washington	1,534	27.74%

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

Important Washington, KS Information

Washington County, KS Covers 15 ZIP Codes. This includes 11 General ZIP Codes, 0 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There are also 4 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Washington County.

The population for Washington County is 5,530, according to the U.S. Census. Population Density is 6.18 persons per square mile. With 2,726 Housing Units, the Average Household Size is 2.34 persons. There are 2,312 Family Households with an Average Family Size of 2.75 persons. 4.49% of the population is without Health Insurance. The 58.87% Employment Rate is 0.93% above the national average of 59.8%.3,819 people aged 25+ have some educational achievement, with 23.30% (or 890 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

785 is the only area code for this area. Washington is also located in the Central timezone and the current local time is shown above.

ZIP Codes in Washington, KS have 2,149 Residential mailboxes and 138 Business mailboxes.There are 205 businesses with a total of 1,441 employees. That is an average of 7.0 employees per business. Annual payroll for these businesses is $51,303,000. Other Demographics

Washington County Demographic Profile

Population & People

Total Population

5,530

Income

Median Household Income

$62,452

Housing

Total Housing Units

2,726

Health

Without Healthcare Coverage

4.49%

Business & Economy

Total Businesses

205

Families

Total Households

2,312

Employment

Employment Rate

58.87%

Education

Bachelor's Degree or Higher

23.30%

Total Population: Total number of people from the 2020 U.S. Census for Washington, KS. 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.	5,530
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Washington, KS. 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.	5,045
Total Households: Total number of Households from the 2020 U.S. Census for Washington, KS. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	2,312
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.	2,726
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.	2.34
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.	2.75

Other Washington Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	2,149
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	138
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.	2,890
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	2,132
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	0

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	205
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$11,081,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$51,303,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	1,441

Sum of all ZIP Codes assigned Washington, KS 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