ZIP code 20899
Where is ZIP code 20899?
Gaithersburg, Maryland
Montgomery County · Unique ZIP code
ZIP code 20899 belongs to Gaithersburg, Maryland in Montgomery County. 20899 is a unique ZIP code assigned to a single organization (Natl Inst Stds & Tech Md) that gets a lot of mail. It is in the Eastern Time zone and uses area codes 227, 240 and 301. About 57 people live in the 20899 area, where the median household income is $24,417. The closest ZIP codes are 20813 (Bethesda, 0.8 mi east), 20827 (Bethesda, 0.8 mi east) and 20848 (Rockville, 0.8 mi east).
| ZIP code | 20899 |
|---|---|
| Type | Unique ZIP code for a single organization |
| Status | Active |
| City | Gaithersburg |
| State | Maryland (MD) |
| County | Montgomery County |
| Time zone | Eastern Time · now |
| Area codes | 227, 240, 301 |
| Coordinates | 39.1403, -77.222 map |
| 3-digit prefix | 208 |
Population and income in 20899
| Population | 57 · lower than 97% of Maryland ZIP codes |
|---|---|
| People per square mile | 538 · higher than 55% of Maryland ZIP codes |
| Median age | 62.8 years · higher than 95% of Maryland ZIP codes |
| Men / women | 56% / 44% |
| Median household income | $24,417 · lower than 100% of Maryland ZIP codes |
| Income per person | $27,240 |
| Below the poverty line | 0.0% |
| Bachelor’s degree or higher | 0.0% of adults 25+ |
| Median rent | $788 a month |
| Housing units | 93 |
| Households | 57 |
| Owners / renters | 0.0% / 100% |
| Land area | 0.11 sq mi |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 20899. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 20899
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 20813 | Bethesda, MD | 0.8 mi E | PO Box only |
| 20827 | Bethesda, MD | 0.8 mi E | PO Box only |
| 20848 | Rockville, MD | 0.8 mi E | PO Box only |
| 20859 | Potomac, MD | 0.8 mi E | PO Box only |
| 20875 | Germantown, MD | 0.8 mi E | PO Box only |
| 20884 | Gaithersburg, MD | 0.8 mi E | PO Box only |
| 20889 | Bethesda, MD | 0.8 mi E | Unique |
| 20894 | Bethesda, MD | 0.8 mi E | Unique |
| 20898 | Gaithersburg, MD | 0.8 mi E | PO Box only |
| 20877 | Gaithersburg, MD | 1.8 mi E | Standard |
| 20878 | Gaithersburg, MD | 2.5 mi SW | Standard |
| 20880 | Washington Grove, MD | 2.6 mi E | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 20899 or measure the distance to another ZIP code.
How to address mail to 20899
123 MAIN ST
GAITHERSBURG MD 20899
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (20899-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Gaithersburg, MD
All Gaithersburg ZIP codes with population and income →
Questions
- What city is ZIP code 20899?
- 20899 is a Gaithersburg, Maryland ZIP code.
- What county is 20899 in?
- ZIP code 20899 is in Montgomery County, Maryland.
- What time zone is ZIP code 20899 in?
- 20899 is in the Eastern Time zone (America/New_York).
- What area code is 20899?
- Phone numbers in ZIP code 20899 use area codes 227, 240 and 301.
- What is the population of ZIP code 20899?
- About 57 people live in ZIP code 20899, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 20899?
- The median household income in 20899 is $24,417 a year, lower than 100% of Maryland ZIP codes.
- Can I use 20899 for a street address?
- Only for mail to the organization it is assigned to. Other addresses in Gaithersburg use a standard ZIP code.
- What ZIP codes are near 20899?
- The nearest ZIP codes to 20899 are 20813 (Bethesda, 0.8 miles), 20827 (Bethesda, 0.8 miles), 20848 (Rockville, 0.8 miles) and 20859 (Potomac, 0.8 miles).