Conowingo, MD 21918 ZIP Code Profile

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Conowingo, MD

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ZIP Code 21918: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Conowingo, MD 21918

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 44
  • Single Family Addresses: 1,460
  • Multi-Family Addresses: 0
  • County: Cecil County
  • Centroid: Latitude 39.676, Longitude -76.153
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

Neighborhood 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 certain data.


21918 ZIP Code Map

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Conowingo, MD 21918 Data & Demographics (As of July 1, 2016)


Total Population 4,748
Population in Households 4,736
Population in Familes 4,164
Population in Group Qrtrs 12
Population Density1 254
Diversity Index2 15


Total Households 1,667
Average Household Size 2.84
Family Households 1,322
Average Family Size 3


Total Housing Units 1,781 (100%)
Owner Occupied HU 1,440 (80.9%)
Renter Occupied HU 227 (12.7%)
Vacant Housing Units 114 ( 6.4%)
Median Home Value $269,975
Average Home Value $271,788


Median Household Income $84,773
Average Household Income $92,428
Per Capita Income $32,545
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.53% 0.26%
Households 0.51% 0.26%
Families 0.42% 0.18%
Median Household Income   2.14%
Per Capita Income   1.59%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Conowingo, MD 21918 - Peer Comparisons by Rank and Percentile

The table below compares 21918 to the other 455 ZIP Codes in Maryland by rank and percentile using July 1, 2016 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 # 242 47th
Population Density1 # 271 41st
Diversity Index2 # 398 13th
Median Household Income # 180 61st
Per Capita Income # 260 43rd

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