Ellicott City, MD 21043 ZIP Code Profile

Related Place Profiles:
Ellicott City, MD | Ilchester, MD

ZIP Code 21043: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Ellicott City, MD 21043

Acceptable Alternative
Daniels, MD 21043
Ilchester, MD 21043
Oella, MD 21043

Not Acceptable, USPS
Ellicott, MD 21043

  • ZIP Code Type: STANDARD
  • County: Howard County
  • Centroid: Latitude 39.266, Longitude -76.846
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 21043 has segments in 2 Counties / Independent Cities (Baltimore, Howard).

  • Businesses Addresses: 755
  • PO Box Addresses: 0
  • Residential Addresses: 17,721
    • Multi-Family Addresses: 5,160
    • Single Family Addresses: 12,561

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


21043 ZIP Code Map

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Ellicott City, MD 21043 Data & Demographics (As of July 1, 2017)


Total Population 47,834
Daytime Population: Workers 13,227
Daytime Population: Residents 22,566
Total Daytime Population (TDP) 35,793
Ratio TDP/Total Population1 0.75
Population in Households 47,615
Population in Familes 40,247
Population in Group Qrtrs 219
Population Density2 2,802
Diversity Index3 66


Median Household Income $106,996
Average Household Income $136,261
Per Capita Income $50,080


Total Housing Units 18,137 (100%)
Owner Occupied HU 11,517 (63.5%)
Renter Occupied HU 6,005 (33.1%)
Vacant Housing Units 615 ( 3.4%)
Median Home Value $473,012
Average Home Value $492,841


Total Households 17,522
Average Household Size 2.72
Family Households 12,230
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.83% 1.84%
Households 1.74% 1.79%
Families 1.56% 1.69%
Median Household Income   1.57%
Per Capita Income   2.18%

Ellicott City, MD 21043 - Peer Comparisons by Rank and Percentile

The table below compares 21043 to the other 456 ZIP Codes in Maryland by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 23 95th
Population Density # 85 82nd
Diversity Index # 62 87th
Median Household Income # 88 81st
Per Capita Income # 77 83rd

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.

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