Williston, MD ZIP Codes
One ZIP code serves Williston, Maryland: 21629. Together they are home to 10,252 residents in 3,688 households. That is more than the 391 people counted inside Williston Census-designated place, because these ZIP codes reach past its boundary.
Williston Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 391 |
| Households | 141 |
| Median household income | $129,479 |
| Median home value | $532,700 |
| Median age | 33.2 |
| Median rent | not published |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 10,252 |
| Households (sum of ZIP codes) | 3,688 |
| Median household income, range across ZIP codes | $73,956 (21629) to $73,956 (21629) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $73,956 |
| Homeowners | 66.4% |
| Households with kids under 18 | 31.8% |
| Moved in the past year | 14.9% |
| Carrier routes in EDDM2GO's route library | 8 routes, 3,945 homes (1 of 1 ZIP codes) |
Every ZIP code in Williston
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21629 | Denton | 10,252 | 3,688 | $73,956 | $334,200 | 66.4% | 31.8% | 14.9% | 8 | 4,285 | 0% of its land |
A ZIP code is listed for Williston when at least 10% of its land lies inside the Williston Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Williston. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Williston.
Counties
- Caroline County — 9 ZIP codes
Price a mailing to Williston ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Williston, MD?
- 21629. A ZIP code is listed for Williston when at least 10% of its land lies inside the Williston Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Williston.
- What is the population of Williston, MD?
- The Census Bureau counts 391 residents inside Williston Census-designated place (ACS 2020–2024). The 1 ZIP code that serve Williston hold 10,252 residents in all.
- What is the median household income in Williston, MD?
- $129,479 inside Williston Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $73,956 to $73,956.
- How many carrier routes and mailboxes are in Williston, MD?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 8 carrier routes reaching 3,945 residential and 339 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.