Knoxville, MD 21758 ZIP Code Profile

Related Place Profiles:
Brunswick, MD | Knoxville, MD

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ZIP Code 21758: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Knoxville, MD 21758

Acceptable Alternative
Brunswick, MD 21758

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 32
  • Single Family Addresses: 1,747
  • Multi-Family Addresses: 0
  • County: Frederick County
  • Centroid: Latitude 39.341, Longitude -77.654
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 21758 has segments in 2 Counties / Independent Cities (Frederick, Washington).

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.


21758 ZIP Code Map

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Knoxville, MD 21758 Data & Demographics (As of July 1, 2015)


Total Population 5,290
Population in Households 5,277
Population in Familes 4,561
Population in Group Qrtrs 13
Population Density1 145
Diversity Index2 27


Total Households 1,881
Average Household Size 2.81
Family Households 1,429
Average Family Size 3


Total Housing Units 2,025 (100%)
Owner Occupied HU 1,577 (77.9%)
Renter Occupied HU 304 (15.0%)
Vacant Housing Units 144 ( 7.1%)
Median Home Value $297,558
Average Home Value $336,636


Median Household Income $86,886
Average Household Income $104,109
Per Capita Income $37,061
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.36% 0.95%
Households 0.36% 1.0%
Families 0.3% 0.88%
Median Household Income   2.89%
Per Capita Income   2.7%
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.


Knoxville, MD 21758 - Peer Comparisons by Rank and Percentile

The table below compares 21758 to the other 440 ZIP Codes in Maryland by rank and percentile using July 1, 2015 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 # 234 47th
Population Density1 # 310 30th
Diversity Index2 # 304 31st
Median Household Income # 171 61st
Per Capita Income # 204 54th

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