ZIP Code 21778 - Rocky Ridge Maryland

21778 Overview

ZIP Code 21778 is located in Rocky Ridge Maryland. 21778 is entirely within Frederick County. Regionally, 21778 is located in Metro DC. Data Updated October 2, 2024

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ZIP Code 21778 Quick Stats

ZIP Code NameRocky Ridge
Primary CountyFrederick County
ZIP Code TypeStandard
Population (2022)880
Area Code(s)240 / 301
Current Time
EDT

ZIP Code 21778 Map

21778 Demographics

21778 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in Maryland based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 21778 is White. The current unemployment level in 21778 is 3.3%.

Population880
Population Growth Rate-50.07%
Population Density53 People per Square Mile
Total Households482
Median Household Income (2021)$54,706
Average Adjusted Gross Income (2021)$338,430
Current Unemployment Rate (September 2024)3.3%
Majority Race/EthnictyWhite - 100.00%

21778 Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White681100%
Black00%
Hispanic00%
Asian00%
Native American00%
Hawaiian/Pac. Islander00%

21778 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College719.17%
Bachelor Degree15019.38%
High School Diploma30739.66%
No High School Diploma344.39%
GED or Alternate141.81%
1 or More Years of College769.82%
Associates Degree779.95%
Masters Degree384.91%
Professional Degree70.9%
Doctorate Degree00%

21778 Geography

Coordinates39.61208344,-77.33368683
Adjacent ZIP Codes
RegionMetro DC
Metropolitan/Micropolitan Stat AreaWashington-Arlington-Alexandria, DC-VA-MD-WV
Time ZoneEastern Daylight Time
IANA TimezoneAmerica/New_York
Area16 Square Miles

21778 Schools

School Districts in 21778
Elementary Schools in 21778
Middle Schools in 21778
High Schools in 21778

21778 Weather and Climate Data

Plant Hardiness ZoneZone 6b: -5F to 0F
Average First Frost DateOctober 11 - 20
Average Last Frost DateApril 21 - 31
Koppen-Geiger Climate ZoneDfa - Humid Continental Hot Summers
Ecoregion64a - Triassic Lowlands

21778 Annual Climate Data

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)22243240505964625543342743
Avg Max Temp (°F)39445365758185847766554464
Avg Precip (In.)3.552.883.873.694.454.223.613.494.173.473.673.2644.34

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