Conowingo, MD 21918 ZIP Code Profile

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Conowingo, MD

ZIP Code 21918: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Conowingo, MD 21918

  • ZIP Code Type: STANDARD
  • County: Cecil County
  • Centroid: Latitude 39.676, Longitude -76.153
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 42
  • PO Box Addresses: 137
  • Residential Addresses: 1,498
    • Multi-Family Addresses: 0
    • Single Family Addresses: 1,498

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2019, Maps updated: February 1, 2019.

Jump to... (On This Page!)
  1. 21918 2018 Demographic Data
  2. Growth Rates for 21918 (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Maryland Research Tools (Easy Tools & Current Data)
  3. Maryland Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Conowingo, MD 21918 Data & Demographics (As of July 1, 2018)


Total Population 4,406
Population in Households 4,391
Population in Familes 3,863
Population in Group Qrtrs 15
Population Density2 259
Diversity Index3 15


Median Household Income $87,484
Average Household Income $94,380
Per Capita Income $33,412


Total Housing Units 1,642 (100%)
Owner Occupied HU 1,339 (81.5%)
Renter Occupied HU 215 (13.1%)
Vacant Housing Units 88 ( 5.4%)
Median Home Value $295,488
Average Home Value $297,872


Total Households 1,554
Average Household Size 2.83
Family Households 1,226
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population 0.34% 0.34%
Households 0.34% 0.33%
Families 0.24% 0.24%
Median Household Income   2.81%
Per Capita Income   3.24%

Conowingo, MD 21918 - Peer Comparisons by Rank and Percentile

The table below compares 21918 to the other 448 ZIP Codes in Maryland by rank and percentile using July 1, 2018 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 # 247 45th
Population Density # 264 41st
Diversity Index # 405 10th
Median Household Income # 186 59th
Per Capita Income # 276 39th

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

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