Cobb Island, MD ZIP Codes
3 ZIP codes serve Cobb Island, Maryland: 20664, 20625 and 20661. Together they are home to 3,987 residents in 1,557 households. That is more than the 916 people counted inside Cobb Island Census-designated place, because these ZIP codes reach past its boundary.
Cobb Island Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 916 |
| Households | 362 |
| Median household income | not published |
| Median home value | $275,000 |
| Median age | 50 |
| Median rent | not published |
All 3 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 3,987 |
| Households (sum of ZIP codes) | 1,557 |
| Median household income, range across ZIP codes | $88,438 (20664) to $88,438 (20664) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $88,438 |
| Homeowners | 76.1% |
| Households with kids under 18 | 33.1% |
| Moved in the past year | 3.9% |
| Carrier routes in EDDM2GO's route library | 3 routes, 1,242 homes (1 of 3 ZIP codes) |
Every ZIP code in Cobb Island
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20664 | Newburg | 3,138 | 1,229 | $88,438 | $475,700 | 69.7% | 35.0% | 5.0% | 3 | 1,287 | 0% of its land |
| 20625 | Cobb Island | 849 | 328 | — | $245,300 | 100.0% | 26.2% | 0.0% | — | — | 100% of its land; mailing city |
| 20661 | Cobb Island | 0 | 0 | — | — | — | — | — | — | — | 100% of its land; mailing city |
A ZIP code is listed for Cobb Island when at least 10% of its land lies inside the Cobb Island Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Cobb Island. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Cobb Island.
Counties
- Charles County — 22 ZIP codes
Price a mailing to Cobb Island ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Cobb Island, MD?
- 20664, 20625 and 20661. A ZIP code is listed for Cobb Island when at least 10% of its land lies inside the Cobb Island Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Cobb Island.
- What is the population of Cobb Island, MD?
- The Census Bureau counts 916 residents inside Cobb Island Census-designated place (ACS 2020–2024). The 3 ZIP codes that serve Cobb Island hold 3,987 residents in all.
- What is the median household income in Cobb Island, MD?
- Across its ZIP codes the medians run from $88,438 to $88,438.
- How many carrier routes and mailboxes are in Cobb Island, MD?
- For the 1 of 3 ZIP codes in EDDM2GO's stored route library: 3 carrier routes reaching 1,242 residential and 45 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.