Sykesville, MD 21784 ZIP Code Profile

Related Place Profiles:
Eldersburg, MD | Gaither, MD | Sykesville, MD

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ZIP Code 21784: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Sykesville, MD 21784

Acceptable Alternative
Eldersburg, MD 21784
Gaither, MD 21784

  • ZIP Code Type: STANDARD
  • County: Carroll County
  • Centroid: Latitude 39.338, Longitude -76.972
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 21784 has segments in 2 Counties / Independent Cities (Carroll, Howard).

  • Businesses Addresses: 1,072
  • PO Box Addresses: 416
  • Residential Addresses: 14,145
    • Multi-Family Addresses: 724
    • Single Family Addresses: 13,421

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.


21784 ZIP Code Map

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Sykesville, MD 21784 Data & Demographics (As of July 1, 2017)


Total Population 39,628
Daytime Population: Workers 12,305
Daytime Population: Residents 18,180
Total Daytime Population (TDP) 30,485
Ratio TDP/Total Population1 0.77
Population in Households 38,470
Population in Familes 34,241
Population in Group Qrtrs 1,158
Population Density2 736
Diversity Index3 25


Median Household Income $106,517
Average Household Income $126,735
Per Capita Income $44,579


Total Housing Units 14,097 (100%)
Owner Occupied HU 11,523 (81.7%)
Renter Occupied HU 2,083 (14.8%)
Vacant Housing Units 491 ( 3.5%)
Median Home Value $391,042
Average Home Value $434,724


Total Households 13,606
Average Household Size 2.83
Family Households 10,671
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 0.61% 0.47%
Households 0.57% 0.46%
Families 0.5% 0.41%
Median Household Income   1.06%
Per Capita Income   2.05%

Sykesville, MD 21784 - Peer Comparisons by Rank and Percentile

The table below compares 21784 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 # 41 91st
Population Density # 177 61st
Diversity Index # 338 26th
Median Household Income # 91 80th
Per Capita Income # 118 74th

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

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