Preston, MD ZIP Codes
One ZIP code serves Preston, Maryland: 21655. Together they are home to 5,053 residents in 1,862 households. That is more than the 852 people counted inside Preston town limits, because these ZIP codes reach past its boundary.
Preston town limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 852 |
| Households | 290 |
| Median household income | $100,000 |
| Median home value | $267,000 |
| Median age | 38.6 |
| Median rent | $1,629 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 5,053 |
| Households (sum of ZIP codes) | 1,862 |
| Median household income, range across ZIP codes | $90,385 (21655) to $90,385 (21655) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $90,385 |
| Homeowners | 84.0% |
| Households with kids under 18 | 31.7% |
| Moved in the past year | 5.8% |
| Carrier routes in EDDM2GO's route library | 3 routes, 1,950 homes (1 of 1 ZIP codes) |
Every ZIP code in Preston
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21655 | Preston | 5,053 | 1,862 | $90,385 | $289,200 | 84.0% | 31.7% | 5.8% | 3 | 2,001 | 1% of its land; mailing city |
A ZIP code is listed for Preston when at least 10% of its land lies inside Preston town limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Preston. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Preston.
Counties
- Caroline County — 9 ZIP codes
Price a mailing to Preston ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Preston, MD?
- 21655. A ZIP code is listed for Preston when at least 10% of its land lies inside Preston town limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Preston.
- What is the population of Preston, MD?
- The Census Bureau counts 852 residents inside Preston town limits (ACS 2020–2024). The 1 ZIP code that serve Preston hold 5,053 residents in all.
- What is the median household income in Preston, MD?
- $100,000 inside Preston town limits, per the Census Bureau. Across its ZIP codes the medians run from $90,385 to $90,385.
- How many carrier routes and mailboxes are in Preston, MD?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 3 carrier routes reaching 1,950 residential and 51 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.