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ZIP code

21771

Mount Airy, MD

STANDARD

21771 covers Mount Airy in Frederick County, with 32,827 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

32,827

Median household income

$154,844

Median home value

$532,200

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 21771. Methodology

ZIP code map of 21771

Census ZCTA boundary for ZIP 21771 in Mount Airy, Maryland
Census ZCTA boundary for ZIP 21771 in Mount Airy, 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 21771

Type

STANDARD

City

Mount Airy

County

Frederick County

Timezone

America/New_York

Area codes

227, 240, 301, 410, 443, 667

Land area

89.5 sq mi

Water area

0.18 sq mi

Households

11,401

Median gross rent

$2,117

More enterprise fields

Timezone
America/New_York
Area Codes
227, 240, 301, 410, 443, 667
World Region
NA
Country
US

Commercial ZIP directory · not ACS

Commercial ZIP directory population_count for ZCTA 21771. Not ACS. Methodology

People in 21771

Race

  • White26,261
  • Black or African American711
  • American Indian or Alaska Native91
  • Asian579
  • Native Hawaiian and Pacific Islander8
  • Other race738
  • Two or more races2,309

Hispanic or Latino (any race): 1,994

Age

  • Under 103,454
  • 10 to 194,326
  • 20 to 293,061
  • 30 to 393,451
  • 40 to 493,724
  • 50 to 595,518
  • 60 to 693,939
  • 70 to 792,156
  • 80 and older1,068

Income and housing in 21771

Poverty rate

3.5%

Median earnings

$70,011

Median household income

$154,844

Median home value

$532,200

Median gross rent

$2,117

Education

  • High school graduate95.2%
  • Bachelor's degree46.1%
  • Graduate degree20.5%

Places covering 21771

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

54.3% of this ZIP is outside city limits (a real overlap row, not missing data).

Population history for 21771

IRS populationACS population
35,45317,727020052023

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
200531,073
200629,508
200730,410
200829,938
200929,990
201030,059
201128,89630,129
201229,10130,330
201328,70030,130
201429,55830,050
201529,77830,140
201629,22030,020
201729,36630,170
201829,26530,120
201929,90129,630
202031,36630,240
202131,75530,060
202231,65330,430
202332,827

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

ZIP codes near 21771

12 nearest ZIP centroids (any distance)

  1. 21770Monrovia6.1 miPop 7,815 · Income $184,464
  2. 21774New Market6.3 miPop 16,515 · Income $171,875
  3. 21797Woodbine6.5 miPop 8,772 · Income $185,435
  4. 20872Damascus7.1 miPop 13,138 · Income $132,804
  5. 21762Libertytown7.6 miPop 176 · Income —
  6. 21776New Windsor9.1 miPop 5,905 · Income $111,923
  7. 21723Cooksville9.5 miPop 587 · Income $250,000+
  8. 21754Ijamsville9.5 miPop 7,439 · Income $179,797
  9. 21791Union Bridge9.7 miPop 4,734 · Income $90,460
  10. 21784Sykesville9.9 miPop 37,813 · Income $141,228
  11. 21701Frederick9.9 miPop 41,340 · Income $102,306
  12. 21738Glenwood10.6 miPop 3,668 · Income $230,429

ZIP centroids within 2 miles

No other ZIP codes within 2 miles of 21771, measured by Census internal-point centroids. Try a wider radius.

ZIPs within 2 miles of this place

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21771 Mount Airy, MD

Looking up ZIP codes within 2 miles of 21771 Mount Airy, MD, measured by centroid distance.

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ZIP code 21771 FAQ

What city is ZIP code 21771 in?
21771 is in Mount Airy, MD.
What county is 21771 in?
21771 is in Frederick County.
What is the median household income in 21771?
The median household income in 21771 is $154,844.
Which ZIP codes are near 21771?
Use the radius tool on this page to list ZIP codes within a chosen distance of 21771.