ZIP Code 21784, Maryland
ZIP Code 21784 profile, demographic data, and geographic information.
ZCTA5 21784 is a 5-digit ZIP Code area located in Carroll County / Howard County, Maryland. As of official census estimates, it has a reported population of 39,258. The land area covers 56.13 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 39,258 | ±1,378 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 38.9 yrs | ±1 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 13,416 | ±454 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 13,797 | ±442 |
| Occupied Housing Units | 13,416 | ±454 |
| Vacant Housing Units | 381 | ±196 |
| Median Home Value | $491,800 | ±$10,009 |
| Median Gross Rent | $1,739 | ±$110 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $139,395 | ±$6,461 |
| Per Capita Income | $56,974 | ±$2,603 |
| Poverty Rate | 4.4% | ±1.3% |
| Population Below Poverty Level | 1,688 | ±484 |
| Unemployment Rate | 3.7% | ±1.3% |
| Civilian Labor Force, Employed | 19,976 | ±853 |
| Broadband Internet Rate | 96.1% | ±4.6% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 177,108 (2024)
ID: 105977
|
County | Official County Government |
Contact: BUDGET ANALYST
225 N CENTER ST, WESTMINSTER MD 21157-5194
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Alternative School Nearby | 09-12 | Ellicott City, MD | |
| Regular School Nearby | PK-05 | Baltimore, MD | |
| Regular School Nearby | 06-08 | Baltimore, MD | |
| Regular School Nearby | PK-05 | Columbia, MD | |
| Regular School Nearby | 09-12 | Columbia, MD | |
| Regular School Nearby | PK-08 | Baltimore, MD | |
| Regular School Nearby | PK-05 | Baltimore, MD | |
| Regular School Nearby | PK-08 | Baltimore, MD | |
| Regular School Nearby | PK-05 | Ellicott City, MD | |
| Regular School Nearby | 06-08 | Ellicott City, MD |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Carroll Community College
|
College | 9.1 mi away | 1601 Washington Rd, Westminster, MD, 21157 |
4103868000
|
|
ELDERSBURG BRANCH
|
Library | 2.0 mi away | 6400 W. HEMLOCK DR., ELDERSBURG, MD, 21784 |
(410) 386-4460
|
|
Stevenson University
|
College | 10.7 mi away | 100 Campus Circle, Owings Mills, MD, 21117 |
4104867000
|
|
GLENWOOD BRANCH
|
Library | 7.0 mi away | 2350 ROUTE 97, COOKSVILLE, MD, 21723 |
(410) 313-5577
|
|
Empire Beauty School-Owings Mills
|
College Vocational | 11.3 mi away | 9616 Reisterstown Rd, Suite 105, Owings Mills, MD, 21117 |
8009204593
|
|
FINKSBURG BRANCH
|
Library | 8.7 mi away | 2265 OLD WESTMINSTER PIKE, FINKSBURG, MD, 21048 |
(410) 386-4505
|
|
Ner Israel Rabbinical College
|
College | 11.8 mi away | 400 Mount Wilson Ln, Baltimore, MD, 21208 |
4104847200
|
|
REISTERSTOWN BRANCH
|
Library | 8.8 mi away | 21 COCKEYS MILL ROAD, REISTERSTOWN, MD, 21136 |
(410) 887-1165
|
|
McDaniel College
|
College | 12.7 mi away | 2 College Hill, Westminster, MD, 21157 |
4108487000
|
|
MOUNT AIRY BRANCH
|
Library | 9.9 mi away | 705 RIDGE AVENUE, MOUNT AIRY, MD, 21771 |
(410) 386-4470
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at DAMASCUS 3 SSW, MD US, located 16.7 miles from ZCTA5 21784. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 39.1° | 24.5° | 31.8° | 3.41" | 9.4" |
| February | 42.6° | 26.1° | 34.4° | 2.98" | 11.1" |
| March | 51.6° | 33.1° | 42.4° | 4.04" | 4.8" |
| April | 63.9° | 42.9° | 53.4° | 3.62" | 0.2" |
| May | 72.5° | 52.8° | 62.6° | 4.35" | 0.0" |
| June | 80.2° | 61.5° | 70.9° | 4.67" | 0.0" |
| July | 84.3° | 66.0° | 75.1° | 4.49" | 0.0" |
| August | 82.6° | 64.6° | 73.6° | 4.18" | 0.0" |
| September | 75.7° | 57.6° | 66.7° | 4.76" | 0.0" |
| October | 64.5° | 46.5° | 55.5° | 4.01" | 0.0" |
| November | 53.3° | 36.4° | 44.9° | 3.49" | 0.8" |
| December | 43.5° | 29.5° | 36.5° | 3.89" | 5.1" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Eldersburg CDP | CDP | 1.2 mi | — |
| Sykesville town | Town | 2.0 mi | — |
| Lisbon CDP | CDP | 6.8 mi | — |
| Reisterstown CDP | CDP | 9.2 mi | — |
| Randallstown CDP | CDP | 9.4 mi | — |
| Mount Airy town | Town | 9.8 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 21784. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.