Washington County, KS ZIP Codes
13 ZIP codes cover all or part of Washington County, Kansas. The Census Bureau counts 5,533 residents in the county, with a median household income of $65,482 and a median home value of $117,100. Median household income ranges from $55,284 in 66938 to $69,688 in 66945. Its largest communities include Washington, Hanover, Linn, Clifton and Greenleaf.
Washington County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 5,533 |
| Households | 2,373 |
| Median household income | $65,482 |
| Median home value | $117,100 |
| Median age | 43.4 |
| Median rent | $562 |
All 13 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 7,596 |
| Households (sum of ZIP codes) | 3,245 |
| Median household income, range across ZIP codes | $55,284 (66938) to $69,688 (66945) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $60,811 |
| Homeowners | 81.4% |
| Households with kids under 18 | 26.6% |
| Moved in the past year | 6.6% |
| Carrier routes in EDDM2GO's route library | 11 routes, 1,549 homes (7 of 13 ZIP codes) |
Top facts
- Highest median household income in Washington County: 66945 ($69,688)
- Most residents: 66968 (1,454 people)
- Highest homeownership: 66945 (87.0% own their home)
- Most households with kids: 66945 (30.4% of households)
- Most new movers: 66938 (10.2% moved in last year)
- Youngest median age: 66945 (32.8 years)
- Highest median home value: 66968 ($124,900)
Every ZIP code in Washington County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 66968 | Washington | 1,454 | 720 | $59,438 | $124,900 | 76.0% | 21.8% | 6.6% | 3 | 779 | 100% of its land |
| 66938 | Clyde | 1,191 | 523 | $55,284 | $80,000 | 86.8% | 26.2% | 10.2% | 2 | 441 | 19% of its land |
| 66945 | Hanover | 1,063 | 437 | $69,688 | $118,000 | 87.0% | 30.4% | 7.4% | — | — | 99% of its land |
| 66937 | Clifton | 691 | 317 | $63,456 | $100,000 | 85.2% | 23.0% | 5.1% | — | — | 54% of its land |
| 66412 | Bremen | 644 | 212 | $86,638 | $179,200 | 88.7% | 52.8% | 0.0% | 1 | 113 | 16% of its land |
| 66953 | Linn | 628 | 239 | $66,250 | $109,200 | 65.7% | 28.0% | 12.5% | — | — | 100% of its land |
| 66943 | Greenleaf | 568 | 214 | $67,738 | $117,300 | 81.3% | 34.1% | 6.5% | — | — | 100% of its land |
| 66933 | Barnes | 345 | 175 | $55,625 | $85,600 | 75.4% | 20.0% | 5.6% | — | — | 95% of its land |
| 66944 | Haddam | 304 | 95 | $75,625 | — | 96.8% | 29.5% | 2.6% | 1 | 81 | 100% of its land |
| 66962 | Palmer | 302 | 123 | $74,583 | $303,700 | 78.9% | 17.9% | 7.7% | 2 | 118 | 78% of its land |
| 66958 | Morrowville | 198 | 85 | $77,750 | $75,000 | 81.2% | 23.5% | 0.0% | 1 | 88 | 100% of its land |
| 66946 | Hollenberg | 161 | 79 | $53,542 | $121,700 | 68.4% | 8.9% | 0.0% | 1 | 54 | 100% of its land |
| 66955 | Mahaska | 47 | 26 | $85,500 | — | 100.0% | 0.0% | 2.1% | — | — | 78% of its land |
A ZIP code is listed for Washington County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Washington — 1,155 residents · 1 ZIP code
- Hanover — 828 residents · 1 ZIP code
- Linn — 470 residents · 1 ZIP code
- Clifton — 442 residents · 1 ZIP code
- Greenleaf — 320 residents · 1 ZIP code
- Barnes — 177 residents · 1 ZIP code
- Palmer — 149 residents · 1 ZIP code
- Haddam — 118 residents · 1 ZIP code
- Morrowville — 96 residents · 1 ZIP code
- Vining — 58 residents · 1 ZIP code
- Mahaska — 47 residents · 1 ZIP code
- Hollenberg — 9 residents · 1 ZIP code
Price a mailing to Washington County ZIP codes
EDDM guides
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Frequently asked questions
- What ZIP codes are in Washington County, KS?
- 66968, 66938, 66945, 66937, 66412, 66953, 66943, 66933, 66944, 66962, 66958, 66946 and 66955. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Washington County?
- 5,533 residents in 2,373 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Washington County?
- $65,482 for the county as a whole. Its ZIP codes range from $55,284 (66938) to $69,688 (66945).
- Which Washington County ZIP code has the highest median household income?
- 66945, at $69,688, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Washington County?
- For the 7 of 13 ZIP codes in EDDM2GO's stored route library: 11 carrier routes reaching 1,549 residential and 125 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.