ZIP Code 21231, Maryland
ZIP Code 21231 profile, demographic data, and geographic information.
ZCTA5 21231 is a 5-digit ZIP Code area located in Baltimore city, Maryland. As of official census estimates, it has a reported population of 14,969. The land area covers 0.87 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 14,969 | ±1,076 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 32.7 yrs | ±1.3 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 8,136 | ±451 | 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 | 9,514 | ±412 |
| Occupied Housing Units | 8,136 | ±451 |
| Vacant Housing Units | 1,378 | ±366 |
| Median Home Value | $350,100 | ±$15,434 |
| Median Gross Rent | $1,796 | ±$60 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $85,254 | ±$8,370 |
| Per Capita Income | $64,422 | ±$4,501 |
| Poverty Rate | 20.6% | ±3.5% |
| Population Below Poverty Level | 3,075 | ±569 |
| Unemployment Rate | 4.2% | ±1.5% |
| Civilian Labor Force, Employed | 9,548 | ±702 |
| Broadband Internet Rate | 93.2% | ±0.8% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | PK-05 | Baltimore, MD | |
| Regular School Nearby | PK-05 | Abingdon, MD | |
| Regular School Nearby | 06-12 | Baltimore, MD | |
| Alternative School Nearby | 09-12 | Baltimore, MD | |
| Alternative School Nearby | 09-12 | Severna Park, MD | |
| Regular School Nearby | PK-05 | Baltimore, MD | |
| Regular School Nearby | 06-08 | Baltimore, MD | |
| Regular School Nearby | PK-05 | Baltimore, MD | |
| Regular School Nearby | PK-08 | Baltimore, MD | |
| Regular School Nearby | PK-02 | Baltimore, 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 |
|---|---|---|---|---|
|
University System of Maryland
|
College | 0.7 mi away | 701 E. Pratt St., Baltimore, MD, 21201 |
3014451901
|
|
BOOKMOBILE HEADQUARTERS
|
Library | 0.6 mi away | 1303 ORLEANS STREET, BALTIMORE, MD, 21231 |
(410) 396-0995
|
|
University System of Maryland-Research Centers
|
College | 0.7 mi away | 701 E. Pratt St., Baltimore, MD, 21201 |
3014451901
|
|
ORLEANS STREET BRANCH
|
Library | 0.6 mi away | 1303 ORLEANS STREET, BALTIMORE, MD, 21230 |
(410) 396-1580
|
|
Baltimore Studio of Hair Design
|
College Vocational | 1.5 mi away | 318 N Howard St, Baltimore, MD, 21201-3444 |
4105391935
|
|
PATTERSON PARK BRANCH
|
Library | 0.9 mi away | 158 N. LINWOOD AVE., BALTIMORE, MD, 21224 |
(410) 396-0983
|
|
University of Maryland, Baltimore
|
College | 1.7 mi away | 620 West Lexington St, Baltimore, MD, 21201-1627 |
4107063100
|
|
CANTON BRANCH
|
Library | 1.2 mi away | 1030 S. ELLWOOD AVE., BALTIMORE, MD, 21224 |
(410) 396-8548
|
|
University of Baltimore
|
College | 1.8 mi away | Charles at Mount Royal, Baltimore, MD, 21201-5720 |
4108374200
|
|
SOUTHEAST ANCHOR LIBRARY
|
Library | 1.4 mi away | 3601 EASTERN AVE., BALTIMORE, MD, 21224 |
(410) 396-1580
|
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 MD SCI CTR BALTIMORE, MD US, located 1.0 miles from ZCTA5 21231. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 43.7° | 30.0° | 36.9° | 3.07" | — |
| February | 46.8° | 31.9° | 39.4° | 2.75" | — |
| March | 55.2° | 38.7° | 46.9° | 3.93" | — |
| April | 66.8° | 48.2° | 57.5° | 3.55" | — |
| May | 75.9° | 58.0° | 67.0° | 3.39" | — |
| June | 85.4° | 67.7° | 76.6° | 3.36" | — |
| July | 90.1° | 72.9° | 81.5° | 4.71" | — |
| August | 87.3° | 71.0° | 79.1° | 4.35" | — |
| September | 80.4° | 64.5° | 72.5° | 4.49" | — |
| October | 68.8° | 52.6° | 60.7° | 3.49" | — |
| November | 57.6° | 42.6° | 50.1° | 2.98" | — |
| December | 48.0° | 34.6° | 41.3° | 3.66" | — |
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 |
|---|---|---|---|
| Baltimore city | City | 1.3 mi | — |
| Baltimore Highlands CDP | CDP | 4.4 mi | — |
| Brooklyn Park CDP | CDP | 5.0 mi | — |
| Dundalk CDP | CDP | 5.3 mi | — |
| Lansdowne CDP | CDP | 5.3 mi | — |
| Rosedale CDP | CDP | 5.3 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 21231. • 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.