Washington County, MO ZIP Codes
14 ZIP codes cover all or part of Washington County, Missouri. The Census Bureau counts 23,470 residents in the county, with a median household income of $56,043 and a median home value of $129,400. Median household income ranges from $41,984 in 63624 to $66,541 in 63080. Its largest communities include Potosi, Irondale, Mineral Point and Caledonia.
Washington County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 23,470 |
| Households | 8,920 |
| Median household income | $56,043 |
| Median home value | $129,400 |
| Median age | 40.7 |
| Median rent | $684 |
All 14 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 48,399 |
| Households (sum of ZIP codes) | 19,314 |
| Median household income, range across ZIP codes | $41,984 (63624) to $66,541 (63080) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $58,774 |
| Homeowners | 74.6% |
| Households with kids under 18 | 31.5% |
| Moved in the past year | 10.7% |
| Carrier routes in EDDM2GO's route library | 38 routes, 16,763 homes (11 of 14 ZIP codes) |
Top facts
- Highest median household income in Washington County: 63080 ($66,541)
- Most residents: 63080 (13,124 people)
- Highest homeownership: 63660 (91.9% own their home)
- Most households with kids: 63630 (38.6% of households)
- Most new movers: 65565 (15.7% moved in last year)
- Youngest median age: 63664 (36.9 years)
- Highest median home value: 65441 ($204,200)
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 63080 | Sullivan | 13,124 | 5,646 | $66,541 | $182,700 | 74.2% | 30.5% | 12.3% | 13 | 6,454 | 39% of its land |
| 63664 | Potosi | 9,693 | 3,658 | $61,216 | $125,100 | 73.2% | 30.8% | 8.3% | 8 | 4,184 | 100% of its land |
| 65441 | Bourbon | 5,028 | 2,075 | $65,050 | $204,200 | 73.6% | 30.4% | 14.0% | — | — | 26% of its land |
| 65565 | Steelville | 4,845 | 2,051 | $50,277 | $163,400 | 64.7% | 33.7% | 15.7% | — | — | 11% of its land |
| 63630 | Cadet | 4,006 | 1,537 | $52,482 | $149,800 | 83.5% | 38.6% | 5.3% | 4 | 1,971 | 93% of its land |
| 63624 | Bismarck | 3,447 | 1,327 | $41,984 | $90,400 | 72.4% | 29.1% | 11.2% | 4 | 1,534 | 29% of its land |
| 63660 | Mineral Point | 2,784 | 720 | $51,410 | $119,700 | 91.9% | 26.9% | 15.7% | 2 | 1,297 | 100% of its land |
| 63648 | Irondale | 1,858 | 734 | $51,765 | $99,500 | 82.4% | 38.0% | 4.3% | 1 | 466 | 93% of its land |
| 63071 | Richwoods | 1,113 | 430 | $44,853 | $122,900 | 70.2% | 23.3% | 12.3% | 1 | 467 | 100% of its land |
| 63622 | Belgrade | 764 | 473 | $31,750 | — | 63.6% | 33.6% | 4.5% | 2 | 374 | 100% of its land |
| 63626 | Blackwell | 588 | 221 | $82,599 | $181,500 | 100.0% | 29.4% | 0.0% | 1 | 432 | 81% of its land |
| 63030 | Fletcher | 557 | 145 | $91,042 | $183,300 | 74.5% | 71.0% | 0.0% | 1 | 114 | 94% of its land |
| 63631 | Caledonia | 544 | 266 | $74,211 | $127,500 | 82.7% | 11.3% | 5.5% | 1 | 365 | 65% of its land |
| 63674 | Washington County | 48 | 31 | — | — | 100.0% | 0.0% | 0.0% | — | — | 100% 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
- Potosi — 2,544 residents · 2 ZIP codes
- Irondale — 622 residents · 1 ZIP code
- Mineral Point — 324 residents · 1 ZIP code
- Caledonia — 209 residents · 1 ZIP code
Rankings
- Richest ZIP codes in Washington County — 9 ZIP codes ranked
- ZIP codes with the highest home values in Washington County — 9 ZIP codes ranked
- ZIP codes with the highest homeownership in Washington County — 9 ZIP codes ranked
- ZIP codes with the most families with kids in Washington County — 9 ZIP codes ranked
- ZIP codes with the most new movers in Washington County — 9 ZIP codes ranked
- Youngest ZIP codes in Washington County — 9 ZIP codes ranked
- Oldest ZIP codes in Washington County — 9 ZIP codes ranked
- Fastest-growing ZIP codes in Washington County — 9 ZIP codes ranked
Price a mailing to Washington County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Washington County, MO?
- 63080, 63664, 65441, 65565, 63630, 63624, 63660, 63648, 63071, 63622, 63626, 63030, 63631 and 63674. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Washington County?
- 23,470 residents in 8,920 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Washington County?
- $56,043 for the county as a whole. Its ZIP codes range from $41,984 (63624) to $66,541 (63080).
- Which Washington County ZIP code has the highest median household income?
- 63080, at $66,541, among ZIP codes with at least 1,000 residents. See the full ranking of Washington County ZIP codes by income.
- How many carrier routes and mailboxes are in Washington County?
- For the 11 of 14 ZIP codes in EDDM2GO's stored route library: 38 carrier routes reaching 16,763 residential and 897 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.