Zip Code 21784
Sykesville, Maryland — Carroll County
📍 ZIP code 21784 is in Sykesville, Carroll County, Maryland.
ZIP code 21784 is located in Sykesville, Carroll County, Maryland. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 37,813. The area code for ZIP code 21784 is 301.
Quick Answer
Zip code 21784 is in Sykesville, Maryland (Carroll County). It has a population of 37,813, median household income of $141,228, and median home value of $478,200.
Population
37,813
Income
$141,228
Home Value
$478,200
Climate
84°F / 25°F
About Zip Code 21784
Zip code 21784 is located in Sykesville, Maryland, within Carroll County. Home to approximately 37,813 residents, this area sits at an elevation of 572 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 301.
The median household income is $141,228 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $478,200, and the cost of living index is 173 (73% above the national average of 100).
Summers average a high of 84°F while winters drop to 25°F. The area receives about 48 in of rain and 31 in of snow annually. The zip code covers 57.5 square miles of land area and 2 square miles of water.
Key Statistics
37,813
$141,228
$478,200
Eastern (EST/EDT)
301
572 ft
57.5 sq mi
39.5
13,664
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Compare With Nearby Zip Codes
| Metric | 21784 | 21104 | 21723 | 21048 | 21797 | 21794 |
|---|---|---|---|---|---|---|
| City | Sykesville, MD | Randallstown, MD | Woodbine, MD | Finksburg, MD | Woodbine, MD | Sykesville, MD |
| Population | 37,813 | 5,786 | 587 | 10,002 | 8,772 | 2,326 |
| Median Income | $141,228 | $199,803 | $250,001 | $122,801 | $185,435 | $223,833 |
| Home Value | $478,200 | $659,700 | $914,800 | $423,900 | $713,400 | $977,200 |
| Cost of Living | 173 | 245 | 250 | 155 | 240 | 250 |
| Median Age | 39.5 | 46 | 41.7 | 44.7 | 44 | 42.2 |
Cost of Living
100 = National Average. Sykesville's cost of living is 73% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.4x
Demographics
Zip code 21784 has a population of 37,813 people with a median age of 39.5. There are 13,664 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Sykesville (21784) population trend from 2010 to 2024
↓ -11.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
84°F
25°F
48 in
31 in
Sykesville experiences warm summers with average highs around 84°F. Winters are cool with lows averaging 25°F. With 31 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$478,200
Median Household Income
$141,228
With 13,664 housing units across 57.5 square miles, 21784 has a housing density of 238 units per square mile. The home price-to-income ratio is 3.4x.
Location & Geography
Latitude
39.4011°
Longitude
-76.9737°
Land Area
57.5 sq mi
Water Area
2 sq mi
Nearby Zip Codes
Zip codes closest to 21784 (Sykesville, MD) with distances:
All Zip Codes in Sykesville, MD
Other zip codes serving Sykesville:
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 21784's $141,228. A way to compare Sykesville to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 21784 (Sykesville, MD). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Sykesville, Maryland?
Sykesville, Maryland uses zip code 21784 along with 1 other zip codes.
What county is zip code 21784 in?
Zip code 21784 is located in Carroll County, Maryland.
What is the population of zip code 21784?
The population of zip code 21784 is 37,813 with a median age of 39.5.
Is 21784 in Sykesville, Maryland?
Yes, zip code 21784 is in Sykesville, Carroll County, Maryland. The area code is 301.
Frequently Asked Questions
What city is zip code 21784 in?
Zip code 21784 is in Sykesville, Maryland. It is part of Carroll County and uses the Eastern (EST/EDT) timezone.
What is zip code 21784?
Zip code 21784 is a U.S. postal code in Sykesville, Maryland (Carroll County). It has a population of 37,813 and covers 57.5 square miles.
What is the population of zip code 21784?
The population of zip code 21784 (Sykesville, MD) is 37,813 with a median age of 39.5. There are approximately 13,664 housing units in this area.
What is the median income in zip code 21784?
The median household income in zip code 21784 (Sykesville, MD) is $141,228 per year. The cost of living index is 173 (100 = national average).
What is the average home price in zip code 21784?
The median home value in zip code 21784 (Sykesville, MD) is $478,200. The cost of living index is 173 compared to the national average of 100.
What county is zip code 21784 in?
Zip code 21784 is located in Carroll County, Maryland. The primary city is Sykesville.
What is the area code for zip code 21784?
Zip code 21784 in Sykesville, MD uses area code 301. It is located in the Eastern (EST/EDT) timezone.
Is zip code 21784 a good place to live?
Zip code 21784 (Sykesville, MD) has a cost of living index of 173 (100 = national average), a median household income of $141,228, and median home values of $478,200. The median age is 39.5. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 21784?
The cost of living index for zip code 21784 (Sykesville, MD) is 173, where 100 represents the national average. This area is above the national average. Median home value: $478,200.
What schools serve zip code 21784?
Zip code 21784 in Sykesville, Maryland is served by the local school district of Carroll County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.