ZIP Code 21104 - Marriottsville Maryland

21104 Overview

ZIP Code 21104 is located in Marriottsville Maryland. Portions of 21104 are also in Eldersburg and Ellicott City. 21104 is primarily within Carroll County, with some portions in Howard County and Baltimore County. Regionally, 21104 is located in Metro Baltimore.

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ZIP Code 21104 Quick Stats

ZIP Code NameMarriottsville
Primary CountyCarroll County
ZIP Code TypeStandard
Population (2022)6,077
Area Code(s)410 / 443 / 667
Current Time
EST

ZIP Code 21104 Map

21104 Demographics

21104 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 21104 is White. The majority race/ethnicity attending public schools in 21104 is White. The current unemployment level in 21104 is 2.8%.

Population6,077
Population Growth Rate30.04%
Population Density359 People per Square Mile
Total Households1,608
Percentage High Income Households17.5%
Median Household Income (2021)$180,789
Average Adjusted Gross Income (2021)$483,210
Current Unemployment Rate (November 2024)2.8%
Majority Race/EthnictyWhite - 80.88%
Public School Majority Race/EthnictyWhite - 42.39%

21104 Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White4,85980.88%
Black2213.68%
Hispanic2153.58%
Asian71311.87%
Native American00%
Hawaiian/Pac. Islander00%

21104 Public School Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White1,03144.63%
Black2068.92%
Hispanic903.9%
Asian97442.16%
Native American80.35%
Hawaiian/Pac. Islander10.04%

21104 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College1143.72%
Bachelor Degree1,08935.58%
High School Diploma75124.53%
No High School Diploma00%
GED or Alternate311.01%
1 or More Years of College42713.95%
Associates Degree1234.02%
Masters Degree43114.08%
Professional Degree491.6%
Doctorate Degree461.5%

21104 Geography

Coordinates39.35027313,-76.90776062
Adjacent ZIP Codes
Cities/Towns in 21104
RegionMetro Baltimore
Metropolitan/Micropolitan Stat AreaBaltimore-Columbia-Towson, MD
Time ZoneEastern Standard Time
IANA TimezoneAmerica/New_York
Area17 Square Miles

21104 Weather and Climate Data

Plant Hardiness ZoneZone 7a: 0F to 5F
Average First Frost DateOctober 11 - 20
Average Last Frost DateApril 21 - 31
Koppen-Geiger Climate ZoneDfa - Humid Continental Hot Summers
Ecoregion64c - Piedmont Uplands

21104 Annual Climate Data

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)23243240505964635643352743
Avg Max Temp (°F)41455466758387857867564565
Avg Precip (In.)3.652.984.223.494.723.993.913.594.143.493.653.4945.32

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