ZIP code
21784
Sykesville, MD
21784 covers Sykesville in Carroll County, with 37,813 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 21784. Methodology
ZIP code map of 21784

About ZIP code 21784
Acceptable cities: Eldersburg, Gaither
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 21784. Not ACS. Methodology
People in 21784
Race
- White33,450
- Black or African American1,865
- American Indian or Alaska Native88
- Asian1,614
- Native Hawaiian and Pacific Islander7
- Other race489
- Two or more races2,515
Hispanic or Latino (any race): 1,594
Age
- Under 104,592
- 10 to 195,505
- 20 to 293,965
- 30 to 395,213
- 40 to 495,086
- 50 to 596,503
- 60 to 694,765
- 70 to 792,896
- 80 and older1,503
Income and housing in 21784
Education
- High school graduate95.7%
- Bachelor's degree53.2%
- Graduate degree22.3%
Places covering 21784
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.
- Eldersburg74.7%
- Sykesville10.8%
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.
- Carroll County94.4%
- Howard County5.6%
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
14.5% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 21784
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 38,452 | |
| 2006 | 36,797 | |
| 2007 | 37,709 | |
| 2008 | 36,748 | |
| 2009 | 36,801 | |
| 2010 | 37,194 | |
| 2011 | 38,965 | 37,118 |
| 2012 | 39,401 | 37,030 |
| 2013 | 39,259 | 37,070 |
| 2014 | 39,696 | 37,270 |
| 2015 | 39,188 | 37,340 |
| 2016 | 39,115 | 38,090 |
| 2017 | 39,091 | 38,260 |
| 2018 | 38,390 | 38,330 |
| 2019 | 37,365 | 38,310 |
| 2020 | 36,484 | 38,600 |
| 2021 | 36,809 | 38,310 |
| 2022 | 37,219 | 38,790 |
| 2023 | 37,813 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 21784
12 nearest ZIP centroids (any distance)
- 21104Marriottsville5.0 miPop 5,786 · Income $199,803
- 21723Cooksville5.2 miPop 587 · Income $250,000+
- 21797Woodbine7.0 miPop 8,772 · Income $185,435
- 21794West Friendship7.1 miPop 2,326 · Income $223,833
- 21048Finksburg7.3 miPop 10,002 · Income $122,801
- 21136Reisterstown7.4 miPop 33,778 · Income $106,559
- 21163Woodstock8.0 miPop 7,031 · Income $131,154
- 21133Randallstown8.8 miPop 31,847 · Income $84,248
- 21738Glenwood8.8 miPop 3,668 · Income $230,429
- 21042Ellicott City9.5 miPop 43,021 · Income $190,504
- 21771Mount Airy9.9 miPop 32,827 · Income $154,844
- 21157Westminster10.2 miPop 40,191 · Income $102,835
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 21784, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 21784 FAQ
- What city is ZIP code 21784 in?
- 21784 is in Sykesville, MD.
- What county is 21784 in?
- 21784 is in Carroll County.
- What is the median household income in 21784?
- The median household income in 21784 is $141,228.
- Which ZIP codes are near 21784?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 21784.