ZIP Code 21042 - Ellicott City Maryland

ZIP Code 21042 is located in Ellicott City Maryland. Portions of 21042 are also in Columbia. 21042 is entirely within Howard County. Regionally, it is located in Metro Baltimore.

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ZIP Code 21042 Quick Stats

ZIP Code NameEllicott City
Primary CountyHoward County
ZIP Code TypeStandard
Population (2022)42,528
Area Code(s)410 / 443 / 667
Current Time

ZIP Code 21042 Map

21042 Demographics

21042 can be classified socioeconomically as Upper 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 21042 is White. The majority race/ethnicity attending public schools in 21042 is Asian. The current unemployment level in 21042 is 2.8%.

Population Growth Rate6.35%
Population Density1,141 People per Square Mile
Total Households13,368
Percentage High Income Households26.5%
Median Household Income (2021)$159,032
Average Adjusted Gross Income (2020)$162,970
Current Unemployment Rate (April 2024)2.8%
Majority Race/EthnictyWhite - 60.52%
Public School Majority Race/EthnictyAsian - 39.35%

21042 Race/Ethnicty Breakdown

Native American640.15%
Hawaiian/Pac. Islander1030.25%

21042 Public School Race/Ethnicty Breakdown

Native American300.33%
Hawaiian/Pac. Islander140.15%

21042 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College9043.42%
Bachelor Degree9,10234.46%
High School Diploma2,87910.9%
No High School Diploma1740.66%
GED or Alternate1880.71%
1 or More Years of College2,4979.45%
Associates Degree1,3805.23%
Masters Degree6,01622.78%
Professional Degree1,7676.69%
Doctorate Degree1,5045.69%

21042 Geography

Adjacent ZIP Codes
Cities/Towns in 21042
RegionMetro Baltimore
Metropolitan/Micropolitan Stat AreaBaltimore-Columbia-Towson, MD
Time ZoneEastern Daylight Time
IANA TimezoneAmerica/New_York
Area37 Square Miles

21042 Politics

US Congressional Districts in 21042
Maryland State Senate Districts in 21042
Maryland State House of Delegates Districts in 21042

21042 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 ZoneCfa - Humid Subtropical Climate
Ecoregion64c - Piedmont Uplands

21042 Annual Climate Data

Avg Min Temp (°F)23253241516064635643352743
Avg Max Temp (°F)41455566758387857968564666
Avg Precip (In.)3.6234.213.474.723.963.923.624.143.483.653.4945.29

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