Gaithersburg, MD · standard
ZIP Code 20899
Montgomery County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 142
- 694/sq mi High-density area
- $24,417
- Median income Below-median income area
- 0.0%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Gaithersburg pairs one of the lowest household incomes in the country, in a low-density, renter-heavy area.
- 1st pct
- household income, US ZIPs
- 694
- people per sq mi
- 0%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20899 against every reporting US ZIP.
ZIP code 20899 is a sparsely populated ZIP (a standard USPS delivery area) in Gaithersburg, Montgomery County, Maryland, home to just 142 residents across 0.2 square miles, a density of 694 people per square mile, in the New York time zone.
ZIP 20899 sits on the lower end of the income spectrum: median household income is $24,417 (79% below the average Maryland ZIP), while per-capita income is $27,240. Unemployment is 53.1%, an important qualifier alongside the household-income figure. The ACS does not report a median home value for this ZIP, so housing cost context is limited to the available tenure and rent fields.
Formal educational attainment runs low here: just 0.0% of adults hold a bachelor's degree or higher, the median age is 62.8, and the average commute is -. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Montgomery County, so 20899 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 20899, Gaithersburg, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
142
Population
0.2
Area (sq mi)
694
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20899?
62.8
Median Age
56.1%
Male
43.9%
Female
26.3%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$24,417
Median Household Income
-79% vs state ZIP avg
$27,240
Per Capita Income
0.0%
Poverty Rate
53.1%
Unemployment Rate
How ZIP 20899 ranks among Maryland ZIPs
Gaithersburg, MD household income vs. every Maryland ZIP code
Median household income among 419 reporting Maryland ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$24,417 0th percentile higher than 0% of 419 Maryland ZIPs
Each bar is a $20K-wide band; taller bars hold more Maryland ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
93housing units
93
Total Housing Units
57
Occupied Units
36
Vacant Units
Occupancy Type
$788
Median Rent
1986
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 8 business establishments in ZIP 20899, employing approximately 198 people with a combined annual payroll of $12,362,000.
8
Businesses
198
Employees
$12.4M
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 4 | 50.0% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 20899 vs 20877 →
ZIP 20899 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20878
Gaithersburg (20878)
62,446 residents
- 20874
Germantown (20874)
57,367 residents
- 20854
Potomac (20854)
49,611 residents
- 20850
Rockville (20850)
46,340 residents
- 20877
Gaithersburg (20877)
34,321 residents
- 20886
Montgomery Village (20886)
33,282 residents
- 20876
Germantown (20876)
25,496 residents
- 20879 24,360
Gaithersburg (20879)
24,360 residents
- 20855 14,295
Derwood (20855)
14,295 residents
What this shows Among its immediate neighbors, ZIP 20899 ranks #0 by population - useful context the national average alone can't give.
ZIP 20899 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20854
Potomac (20854)
$250,000 median income
- 20855
Derwood (20855)
$149,110 median income
- 20878
Gaithersburg (20878)
$144,313 median income
- 20880
Washington Grove (20880)
$134,583 median income
- 20850
Rockville (20850)
$125,950 median income
- 20876
Germantown (20876)
$119,731 median income
- 20874
Germantown (20874)
$115,022 median income
- 20879
Gaithersburg (20879)
$112,104 median income
- 20886 $98,542
Montgomery Village (20886)
$98,542 median income
What this shows By household income, ZIP 20899 ranks #null of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20877 | Gaithersburg, MD | 34,321 | 1.5 mi |
| 20880 | Washington Grove, MD | 450 | 2.3 mi |
| 20886 | Montgomery Village, MD | 33,282 | 2.8 mi |
| 20879 | Gaithersburg, MD | 24,360 | 2.8 mi |
| 20878 | Gaithersburg, MD | 62,446 | 2.9 mi |
| 20876 | Germantown, MD | 25,496 | 4.5 mi |
| 20850 | Rockville, MD | 46,340 | 4.1 mi |
| 20855 | Derwood, MD | 14,295 | 4.5 mi |
| 20874 | Germantown, MD | 57,367 | 4.5 mi |
| 20854 | Potomac, MD | 49,611 | 7.6 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 20899, both outside MD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Montgomery County
Related Areas
Frequently Asked Questions
What county is ZIP code 20899 in?
ZIP code 20899 (Gaithersburg) is located in Montgomery County, Maryland. Montgomery County contains multiple ZIP codes, see the full list at /counties/montgomery-md.
What is the population of ZIP code 20899?
ZIP code 20899 in Gaithersburg, MD has a population of 142 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 20899?
The median household income in ZIP 20899 is $24,417, which is 68% below the national average of $76,288.
What is the demographic makeup of ZIP 20899?
The largest racial group in ZIP 20899 is African American at 100.0%.
How many businesses are in ZIP code 20899?
ZIP code 20899 has 8 business establishments employing approximately 198 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
Related
Take this with you
What to do with ZIP 20899's numbers, next.
- See how ZIP 20899 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Gaithersburg, MD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.