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ZIP code

21042

Ellicott City, MD

STANDARD

21042 covers Ellicott City in Howard County, with 43,021 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

43,021

Median household income

$190,504

Median home value

$674,700

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 21042. Methodology

ZIP code map of 21042

Census ZCTA boundary for ZIP 21042 in Ellicott City, Maryland
Census ZCTA boundary for ZIP 21042 in Ellicott City, 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 21042

Type

STANDARD

City

Ellicott City

County

Howard County

Timezone

America/New_York

Area codes

410, 443, 667

Land area

37.0 sq mi

Water area

0.17 sq mi

Households

15,269

Median gross rent

$2,253

More enterprise fields

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

Commercial ZIP directory · not ACS

Commercial ZIP directory population_count for ZCTA 21042. Not ACS. Methodology

People in 21042

Race

  • White24,716
  • Black or African American2,968
  • American Indian or Alaska Native57
  • Asian11,995
  • Native Hawaiian and Pacific Islander7
  • Other race484
  • Two or more races2,920

Hispanic or Latino (any race): 1,625

Age

  • Under 104,896
  • 10 to 197,034
  • 20 to 293,309
  • 30 to 394,128
  • 40 to 496,427
  • 50 to 596,404
  • 60 to 695,633
  • 70 to 793,582
  • 80 and older1,734

Income and housing in 21042

Poverty rate

2.7%

Median earnings

$94,089

Median household income

$190,504

Median home value

$674,700

Median gross rent

$2,253

Education

  • High school graduate97.5%
  • Bachelor's degree74.7%
  • Graduate degree41.3%

Places covering 21042

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

17.5% of this ZIP is outside city limits (a real overlap row, not missing data).

Population history for 21042

IRS populationACS population
47,46623,733020052023

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
200540,307
200637,607
200738,502
200838,282
200938,866
201039,391
201138,44739,762
201239,55639,680
201339,24339,680
201440,58539,350
201539,50840,280
201639,81241,670
201740,38842,220
201840,98042,660
201941,19542,560
202042,15742,830
202142,95242,880
202242,52843,950
202343,021

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

ZIP codes near 21042

12 nearest ZIP centroids (any distance)

  1. 21794West Friendship4.1 miPop 2,326 · Income $223,833
  2. 21163Woodstock4.9 miPop 7,031 · Income $131,154
  3. 21104Marriottsville4.9 miPop 5,786 · Income $199,803
  4. 21044Columbia5.0 miPop 44,775 · Income $132,924
  5. 21043Ellicott City5.2 miPop 47,134 · Income $141,846
  6. 21029Clarksville5.6 miPop 13,783 · Income $250,000+
  7. 21045Columbia6.1 miPop 40,866 · Income $117,323
  8. 21036Dayton6.7 miPop 2,162 · Income $170,313
  9. 21723Cooksville6.8 miPop 587 · Income $250,000+
  10. 21738Glenwood7.1 miPop 3,668 · Income $230,429
  11. 21737Glenelg7.4 miPop 2,384 · Income $250,000+
  12. 21244Windsor Mill7.5 miPop 39,545 · Income $84,849

ZIP centroids within 2 miles

No other ZIP codes within 2 miles of 21042, measured by Census internal-point centroids. Try a wider radius.

ZIPs within 2 miles of this place

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21042 Ellicott City, MD

Looking up ZIP codes within 2 miles of 21042 Ellicott City, MD, measured by centroid distance.

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ZIP code 21042 FAQ

What city is ZIP code 21042 in?
21042 is in Ellicott City, MD.
What county is 21042 in?
21042 is in Howard County.
What is the median household income in 21042?
The median household income in 21042 is $190,504.
Which ZIP codes are near 21042?
Use the radius tool on this page to list ZIP codes within a chosen distance of 21042.