Saint Leonard, MD 20685 ZIP Code Profile

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Saint Leonard, MD

ZIP Code 20685: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Saint Leonard, MD 20685

Not Acceptable, USPS
St Leonard, MD 20685

  • ZIP Code Type: STANDARD
  • County: Calvert County
  • Centroid: Latitude 38.439, Longitude -76.519
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 75
  • PO Box Addresses: 232
  • Residential Addresses: 2,320
    • Multi-Family Addresses: 0
    • Single Family Addresses: 2,320

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


20685 ZIP Code Map

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Saint Leonard, MD 20685 Data & Demographics (As of July 1, 2018)


Total Population 6,721
Population in Households 6,709
Population in Familes 5,877
Population in Group Qrtrs 12
Population Density2 293
Diversity Index3 33


Median Household Income $111,029
Average Household Income $127,378
Per Capita Income $43,523


Total Housing Units 2,539 (100%)
Owner Occupied HU 2,051 (80.8%)
Renter Occupied HU 242 ( 9.5%)
Vacant Housing Units 246 ( 9.7%)
Median Home Value $389,573
Average Home Value $440,566


Total Households 2,293
Average Household Size 2.93
Family Households 1,781
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 0.43% 0.54%
Households 0.39% 0.51%
Families 0.3% 0.45%
Median Household Income   2.09%
Per Capita Income   2.95%

Saint Leonard, MD 20685 - Peer Comparisons by Rank and Percentile

The table below compares 20685 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 # 211 53rd
Population Density # 254 44th
Diversity Index # 278 38th
Median Household Income # 89 80th
Per Capita Income # 150 67th

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

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