Monkton, MD 21111 ZIP Code Profile

Related Place Profiles:
Hereford, MD | Monkton, MD

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ZIP Code 21111: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Monkton, MD 21111

Acceptable Alternative
Hereford, MD 21111

  • ZIP Code Type: STANDARD
  • County: Baltimore County
  • Centroid: Latitude 39.57, Longitude -76.593
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 21111 has segments in 2 Counties / Independent Cities (Baltimore, Harford).

  • Businesses Addresses: 184
  • PO Box Addresses: 131
  • Residential Addresses: 1,832
    • Multi-Family Addresses: 0
    • Single Family Addresses: 1,832

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


21111 ZIP Code Map

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Monkton, MD 21111 Data & Demographics (As of July 1, 2017)


Total Population 4,579
Daytime Population: Workers 1,130
Daytime Population: Residents 2,224
Total Daytime Population (TDP) 3,354
Ratio TDP/Total Population1 0.73
Population in Households 4,569
Population in Familes 4,079
Population in Group Qrtrs 10
Population Density2 134
Diversity Index3 21


Median Household Income $114,312
Average Household Income $152,631
Per Capita Income $55,508


Total Housing Units 1,723 (100%)
Owner Occupied HU 1,455 (84.4%)
Renter Occupied HU 208 (12.1%)
Vacant Housing Units 60 ( 3.5%)
Median Home Value $606,216
Average Home Value $663,780


Total Households 1,663
Average Household Size 2.75
Family Households 1,314
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 0.47% 0.5%
Households 0.29% 0.39%
Families 0.19% 0.33%
Median Household Income   1.23%
Per Capita Income   1.7%

Monkton, MD 21111 - Peer Comparisons by Rank and Percentile

The table below compares 21111 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 # 244 47th
Population Density # 329 28th
Diversity Index # 367 20th
Median Household Income # 60 87th
Per Capita Income # 45 90th

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

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