Gwynn Oak, MD 21207 ZIP Code Profile

Related Place Profiles:
Pikesville, MD | Woodlawn, MD

ZIP Code 21207: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Gwynn Oak, MD 21207

Acceptable Alternative
Baltimore, MD 21207
Pikesville, MD 21207
Woodlawn, MD 21207

  • ZIP Code Type: STANDARD
  • County: Baltimore County
  • Centroid: Latitude 39.324, Longitude -76.714
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 21207 has segments in 2 Counties / Independent Cities (Baltimore, Baltimore City).

  • Businesses Addresses: 847
  • PO Box Addresses: 419
  • Residential Addresses: 19,169
    • Multi-Family Addresses: 3,254
    • Single Family Addresses: 15,915

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.


21207 ZIP Code Map

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Gwynn Oak, MD 21207 Data & Demographics (As of July 1, 2017)


Total Population 48,732
Daytime Population: Workers 21,195
Daytime Population: Residents 25,906
Total Daytime Population (TDP) 47,101
Ratio TDP/Total Population1 0.97
Population in Households 48,325
Population in Familes 38,143
Population in Group Qrtrs 407
Population Density2 4,642
Diversity Index3 32


Median Household Income $51,200
Average Household Income $61,862
Per Capita Income $24,151


Total Housing Units 20,748 (100%)
Owner Occupied HU 10,923 (52.6%)
Renter Occupied HU 7,862 (37.9%)
Vacant Housing Units 1,963 ( 9.5%)
Median Home Value $200,232
Average Home Value $217,246


Total Households 18,785
Average Household Size 2.57
Family Households 12,017
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 0.01% 0.15%
Households -0.11% 0.07%
Families -0.21% 0.0%
Median Household Income   0.49%
Per Capita Income   1.95%

Gwynn Oak, MD 21207 - Peer Comparisons by Rank and Percentile

The table below compares 21207 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 # 19 96th
Population Density # 49 89th
Diversity Index # 280 39th
Median Household Income # 386 16th
Per Capita Income # 399 13th

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

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