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ZIP code

20878

Gaithersburg, MD

STANDARD

20878 covers Gaithersburg in Montgomery County, with 65,236 people in the ACS 2023 estimate.

Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology

ACS 2023 population

65,236

Median household income

$142,062

Median home value

$675,200

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 20878. Methodology

ZIP code map of 20878

Census ZCTA boundary for ZIP 20878 in Gaithersburg, Maryland
Census ZCTA boundary for ZIP 20878 in Gaithersburg, Maryland. A ZCTA is not the same as a USPS ZIP code. Boundaries: U.S. Census Bureau. Methodology · Data sources
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About ZIP code 20878

Type

STANDARD

City

Gaithersburg

County

Montgomery County

Timezone

America/New_York

Area codes

227, 240, 301

Land area

20.4 sq mi

Water area

0.38 sq mi

Households

25,297

Median gross rent

$2,188

Acceptable cities: Darnestown, N Potomac, No Potomac, North Potomac

More enterprise fields

Timezone
America/New_York
Area Codes
227, 240, 301
World Region
NA
Country
US

Commercial ZIP directory · not ACS

Commercial ZIP directory population_count for ZCTA 20878. Not ACS. Methodology

People in 20878

Race

  • White30,565
  • Black or African American6,720
  • American Indian or Alaska Native274
  • Asian17,340
  • Native Hawaiian and Pacific Islander41
  • Other race4,767
  • Two or more races6,283

Hispanic or Latino (any race): 9,468

Age

  • Under 108,045
  • 10 to 199,137
  • 20 to 297,036
  • 30 to 399,040
  • 40 to 499,521
  • 50 to 599,472
  • 60 to 697,957
  • 70 to 794,267
  • 80 and older1,515

Income and housing in 20878

Poverty rate

5.0%

Median earnings

$76,026

Median household income

$142,062

Median home value

$675,200

Median gross rent

$2,188

Education

  • High school graduate96.2%
  • Bachelor's degree70.1%
  • Graduate degree34.9%

Places covering 20878

Cities and places — Population overlap

Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

Counties — Population overlap

Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.

ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

7.2% of this ZIP is outside city limits (a real overlap row, not missing data).

Population history for 20878

IRS populationACS population
71,27935,639020052023

Hover the chart or read the table below (Year | ACS | IRS).

Population history. Year | ACS population | IRS population. ACS and IRS are separate series. Blank cells mean that source did not publish a count for the year.
YearACS populationIRS population
200560,343
200657,562
200759,266
200859,228
200960,410
201061,487
201162,89261,529
201262,98361,700
201363,47462,690
201463,85562,410
201564,89062,930
201664,35662,400
201764,82863,110
201864,12663,350
201963,03062,280
202063,57662,780
202165,99962,020
202265,95463,690
202365,236

ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.

ZIP codes near 20878

12 nearest ZIP centroids (any distance)

  1. 20899Gaithersburg2.9 miPop 106 · Income $23,917
  2. 20874Germantown3.1 miPop 62,233 · Income $109,648
  3. 20877Gaithersburg3.7 miPop 39,068 · Income $86,103
  4. 20850Rockville4.1 miPop 50,365 · Income $122,691
  5. 20880Washington Grove4.5 miPop 590 · Income $160,417
  6. 20854Potomac5.7 miPop 49,694 · Income $250,000+
  7. 20886Montgomery Village5.8 miPop 34,419 · Income $98,767
  8. 20879Gaithersburg6.0 miPop 26,120 · Income $105,109
  9. 20841Boyds6.2 miPop 9,706 · Income $184,276
  10. 20876Germantown6.6 miPop 26,511 · Income $113,329
  11. 20855Derwood6.6 miPop 16,557 · Income $147,708
  12. 20851Rockville7.3 miPop 14,660 · Income $113,951

ZIP centroids within 2 miles

No other ZIP codes within 2 miles of 20878, measured by Census internal-point centroids. Try a wider radius.

ZIPs within 2 miles of this place

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20878 Gaithersburg, MD

Looking up ZIP codes within 2 miles of 20878 Gaithersburg, MD, measured by centroid distance.

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ZIP code 20878 FAQ

What city is ZIP code 20878 in?
20878 is in Gaithersburg, MD.
What county is 20878 in?
20878 is in Montgomery County.
What is the median household income in 20878?
The median household income in 20878 is $142,062.
Which ZIP codes are near 20878?
Use the radius tool on this page to list ZIP codes within a chosen distance of 20878.