ZIP code 20855
Where is ZIP code 20855?
Derwood, Maryland
Montgomery County · Standard ZIP code
ZIP code 20855 belongs to Derwood, Maryland in Montgomery County. 20855 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 227, 240 and 301. About 17,279 people live in the 20855 area, where the median household income is $149,110. The closest ZIP codes are 20880 (Washington Grove, 1.4 mi west), 20877 (Gaithersburg, 2.3 mi west) and 20883 (Gaithersburg, 3.2 mi south).
| ZIP code | 20855 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Derwood |
| Also accepted | Rockville |
| State | Maryland (MD) |
| County | Montgomery County |
| Time zone | Eastern Time · now |
| Area codes | 227, 240, 301 |
| Coordinates | 39.1345, -77.1477 map |
| 3-digit prefix | 208 |
Population and income in 20855
| Population | 17,279 · higher than 70% of Maryland ZIP codes |
|---|---|
| People per square mile | 1,322 · higher than 69% of Maryland ZIP codes |
| Median age | 41.3 years · lower than 54% of Maryland ZIP codes |
| Men / women | 47% / 53% |
| Median household income | $149,110 · higher than 80% of Maryland ZIP codes |
| Income per person | $69,847 |
| Below the poverty line | 5.2% |
| Bachelor’s degree or higher | 67% of adults 25+ |
| Median home value | $640,300 · higher than 87% of Maryland ZIP codes |
| Median rent | $2,413 a month |
| Housing units | 6,525 |
| Households | 6,437 (2.67 people on average) |
| Owners / renters | 74% / 26% |
| Land area | 13.07 sq mi (plus 0.22 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 20855. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 20855
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 20880 | Washington Grove, MD | 1.4 mi W | PO Box only |
| 20877 | Gaithersburg, MD | 2.3 mi W | Standard |
| 20883 | Gaithersburg, MD | 3.2 mi S | PO Box only |
| 20813 | Bethesda, MD | 3.3 mi W | PO Box only |
| 20827 | Bethesda, MD | 3.3 mi W | PO Box only |
| 20848 | Rockville, MD | 3.3 mi W | PO Box only |
| 20859 | Potomac, MD | 3.3 mi W | PO Box only |
| 20875 | Germantown, MD | 3.3 mi W | PO Box only |
| 20884 | Gaithersburg, MD | 3.3 mi W | PO Box only |
| 20889 | Bethesda, MD | 3.3 mi W | Unique |
| 20894 | Bethesda, MD | 3.3 mi W | Unique |
| 20898 | Gaithersburg, MD | 3.3 mi W | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 20855 or measure the distance to another ZIP code.
How to address mail to 20855
123 MAIN ST
DERWOOD MD 20855
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts ROCKVILLE as the city name for 20855. Adding the 4-digit ZIP+4 code (20855-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 20855?
- 20855 is a Derwood, Maryland ZIP code. Rockville is also accepted as the city name.
- What county is 20855 in?
- ZIP code 20855 is in Montgomery County, Maryland.
- What time zone is ZIP code 20855 in?
- 20855 is in the Eastern Time zone (America/New_York).
- What area code is 20855?
- Phone numbers in ZIP code 20855 use area codes 227, 240 and 301.
- What is the population of ZIP code 20855?
- About 17,279 people live in ZIP code 20855, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 20855?
- The median household income in 20855 is $149,110 a year, higher than 80% of Maryland ZIP codes.
- What ZIP codes are near 20855?
- The nearest ZIP codes to 20855 are 20880 (Washington Grove, 1.4 miles), 20877 (Gaithersburg, 2.3 miles), 20883 (Gaithersburg, 3.2 miles) and 20813 (Bethesda, 3.3 miles).