Mechanicsville, MD 20659 ZIP Code Profile

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Mechanicsville, MD

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ZIP Code 20659: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Mechanicsville, MD 20659

Acceptable Alternative
Mechanicsvlle, MD 20659

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 326
  • Single Family Addresses: 8,012
  • Multi-Family Addresses: 0
  • County: St. Mary's County
  • Centroid: Latitude 38.438, Longitude -76.724
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 20659 has segments in 2 Counties / Independent Cities (Charles, Saint Marys).

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.


20659 ZIP Code Map

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Mechanicsville, MD 20659 Data & Demographics (As of July 1, 2016)


Total Population 25,543
Population in Households 25,365
Population in Familes 22,358
Population in Group Qrtrs 178
Population Density1 258
Diversity Index2 26


Total Households 8,406
Average Household Size 3.02
Family Households 6,680
Average Family Size 3


Total Housing Units 8,889 (100%)
Owner Occupied HU 7,159 (80.5%)
Renter Occupied HU 1,247 (14.0%)
Vacant Housing Units 483 ( 5.4%)
Median Home Value $320,223
Average Home Value $355,046


Median Household Income $89,970
Average Household Income $100,333
Per Capita Income $33,273
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.16% 1.24%
Households 1.02% 1.15%
Families 0.94% 1.09%
Median Household Income   2.15%
Per Capita Income   1.69%
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.

Mechanicsville, MD 20659 - Peer Comparisons by Rank and Percentile

The table below compares 20659 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 # 101 78th
Population Density1 # 268 41st
Diversity Index2 # 318 30th
Median Household Income # 157 66th
Per Capita Income # 252 45th

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