San Mar, MD ZIP Codes
One ZIP code serves San Mar, Maryland: 21713. Together they are home to 9,846 residents in 3,899 households. That is more than the 306 people counted inside San Mar Census-designated place, because these ZIP codes reach past its boundary.
San Mar Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 306 |
| Households | 117 |
| Median household income | not published |
| Median home value | $240,500 |
| Median age | 79.4 |
| Median rent | $616 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 9,846 |
| Households (sum of ZIP codes) | 3,899 |
| Median household income, range across ZIP codes | $96,199 (21713) to $96,199 (21713) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $96,199 |
| Homeowners | 83.6% |
| Households with kids under 18 | 28.7% |
| Moved in the past year | 11.2% |
| Carrier routes in EDDM2GO's route library | 7 routes, 3,877 homes (1 of 1 ZIP codes) |
Every ZIP code in San Mar
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21713 | Boonsboro | 9,846 | 3,899 | $96,199 | $369,200 | 83.6% | 28.7% | 11.2% | 7 | 4,020 | 1% of its land |
A ZIP code is listed for San Mar when at least 10% of its land lies inside the San Mar Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is San Mar. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside San Mar.
Counties
- Washington County — 19 ZIP codes
Price a mailing to San Mar ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in San Mar, MD?
- 21713. A ZIP code is listed for San Mar when at least 10% of its land lies inside the San Mar Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is San Mar.
- What is the population of San Mar, MD?
- The Census Bureau counts 306 residents inside San Mar Census-designated place (ACS 2020–2024). The 1 ZIP code that serve San Mar hold 9,846 residents in all.
- What is the median household income in San Mar, MD?
- Across its ZIP codes the medians run from $96,199 to $96,199.
- How many carrier routes and mailboxes are in San Mar, MD?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 7 carrier routes reaching 3,877 residential and 142 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.