ZIP code
21770
Monrovia, MD
21770 covers Monrovia in Frederick County, with 7,815 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
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 21770. Methodology
ZIP code map of 21770
About ZIP code 21770
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 21770. Not ACS. Methodology
People in 21770
Race
- White5,700
- Black or African American446
- American Indian or Alaska Native23
- Asian529
- Other race243
- Two or more races634
Hispanic or Latino (any race): 661
Age
- Under 101,068
- 10 to 191,001
- 20 to 29728
- 30 to 391,052
- 40 to 49908
- 50 to 591,117
- 60 to 69992
- 70 to 79536
- 80 and older173
Income and housing in 21770
Education
- High school graduate98.5%
- Bachelor's degree54.5%
- Graduate degree24.1%
Places covering 21770
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.
- Green Valley62.7%
- Monrovia35.7%
- New Market0.0%
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.
- Frederick County100.0%
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
1.6% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 21770
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 5,858 | |
| 2006 | 5,399 | |
| 2007 | 5,455 | |
| 2008 | 5,327 | |
| 2009 | 5,339 | |
| 2010 | 5,285 | |
| 2011 | 5,932 | 5,239 |
| 2012 | 5,923 | 5,160 |
| 2013 | 5,645 | 5,040 |
| 2014 | 5,457 | 5,140 |
| 2015 | 5,307 | 5,090 |
| 2016 | 5,187 | 5,920 |
| 2017 | 5,021 | 6,480 |
| 2018 | 5,453 | 7,040 |
| 2019 | 5,513 | 7,650 |
| 2020 | 6,145 | 8,280 |
| 2021 | 7,291 | 8,600 |
| 2022 | 7,786 | 9,000 |
| 2023 | 7,815 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 21770
12 nearest ZIP centroids (any distance)
- 21754Ijamsville3.4 miPop 7,439 · Income $179,797
- 21774New Market4.3 miPop 16,515 · Income $171,875
- 20872Damascus4.4 miPop 13,138 · Income $132,804
- 21771Mount Airy6.1 miPop 32,827 · Income $154,844
- 21704Frederick6.4 miPop 19,623 · Income $164,457
- 20871Clarksburg6.5 miPop 28,329 · Income $177,120
- 21701Frederick7.6 miPop 41,340 · Income $102,306
- 21762Libertytown9.0 miPop 176 · Income —
- 21705Frederick9.2 miPop 4 · Income —
- 21717Buckeystown9.4 miPop 296 · Income $153,030
- 20882Gaithersburg9.8 miPop 13,661 · Income $186,964
- 21710Adamstown9.8 miPop 4,901 · Income $164,727
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 21770, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 21770 FAQ
- What city is ZIP code 21770 in?
- 21770 is in Monrovia, MD.
- What county is 21770 in?
- 21770 is in Frederick County.
- What is the median household income in 21770?
- The median household income in 21770 is $184,464.
- Which ZIP codes are near 21770?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 21770.