ZIP code
21778
Rocky Ridge, MD
21778 covers Rocky Ridge in Frederick County, with 840 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 21778. Methodology
ZIP code map of 21778
About ZIP code 21778
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 21778. Not ACS. Methodology
People in 21778
Race
- White1,057
- Black or African American4
- American Indian or Alaska Native2
- Asian17
- Other race28
- Two or more races37
Hispanic or Latino (any race): 39
Age
- Under 10114
- 10 to 19107
- 20 to 29120
- 30 to 39112
- 40 to 49135
- 50 to 59163
- 60 to 69198
- 70 to 79150
- 80 and older46
Income and housing in 21778
Education
- High school graduate93.9%
- Bachelor's degree23.1%
- Graduate degree17.7%
Places covering 21778
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.
No place overlap rows for this ZIP.
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
100.0% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 21778
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 1,041 | |
| 2006 | 1,021 | |
| 2007 | 1,079 | |
| 2008 | 1,036 | |
| 2009 | 1,070 | |
| 2010 | 1,066 | |
| 2011 | 1,333 | 1,052 |
| 2012 | 1,345 | 1,010 |
| 2013 | 1,288 | 1,030 |
| 2014 | 1,141 | 990 |
| 2015 | 1,077 | 990 |
| 2016 | 1,220 | 980 |
| 2017 | 1,364 | 980 |
| 2018 | 940 | 920 |
| 2019 | 909 | 960 |
| 2020 | 930 | 1,020 |
| 2021 | 681 | 1,060 |
| 2022 | 880 | 1,060 |
| 2023 | 840 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 21778
12 nearest ZIP centroids (any distance)
- 21757Keymar4.0 miPop 2,810 · Income $98,520
- 21788Thurmont4.9 miPop 11,919 · Income $93,717
- 21727Emmitsburg5.0 miPop 6,079 · Income $92,697
- 21798Woodsboro5.7 miPop 2,765 · Income $125,583
- 21780Sabillasville8.6 miPop 1,814 · Income $64,602
- 21793Walkersville8.8 miPop 10,914 · Income $128,504
- 21787Taneytown9.3 miPop 11,549 · Income $88,212
- 21791Union Bridge9.4 miPop 4,734 · Income $90,460
- 21762Libertytown10.3 miPop 176 · Income —
- 21719Cascade11.0 miPop 1,162 · Income $75,278
- 17320Fairfield11.1 miPop 8,103 · Income $87,321
- 21702Frederick11.2 miPop 47,437 · Income $104,659
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 21778, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
Default is 2 miles. Distances are between ZIP centroids. Widen the radius if nothing is in range.
ZIP code 21778 FAQ
- What city is ZIP code 21778 in?
- 21778 is in Rocky Ridge, MD.
- What county is 21778 in?
- 21778 is in Frederick County.
- What is the median household income in 21778?
- The median household income in 21778 is $110,489.
- Which ZIP codes are near 21778?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 21778.