US Gazetteer > Maryland Gazetteer > Maryland ZIP Codes > Baltimore, MD 21231

City/Town Names Most Popular Resources Current Weather & 7-Day Forecast 
Preferred Name, USPS
Baltimore, MD 21231
Not Acceptable, USPS
Patterson, MD 21231

Baltimore MD MLS real estate listings Search the MLS in Baltimore, MD

Property & neighborhood reports Property & Neighborhood Reports

Apartments in/near Baltimore MD Apartments | Job Search

background checks Instant Background Checks
Weather forecast ZIP Code 21231

The 21231 ZIP Code is centered1 in Baltimore City County at latitude 39.29 and longitude -76.594 (Panoramio Photos). It is a standard type ZIP Code. Baltimore City County is in the Eastern Time Zone (UTC -5 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 21231 was 15,734 with 9,010 housing units; a land area land area of 0.81 sq. miles; a water area of 0 sq. miles; and a population density of 19,367.47 people per sq. mile for Census 2000. Demographic Profile

Baltimore, MD 21231 Map (Marker is ZIP Code Centroid)

Local Search, 21231 ZIP Code| Distance & Driving Directions

Nearby Cities, Towns & Census Designated Places

Baltimore, MD (1.4 miles W)
South Baltimore, MD (1.4 miles SSW)
Highlandtown, MD (1.4 miles E)
Canton, MD (1.4 miles ESE)
Orangeville, MD (2.4 miles ENE)
Armistead Gardens, MD (2.4 miles ENE)
Waverly, MD (2.7 miles NNW)
Mount Winans, MD (3.1 miles SW)
Westport, MD (3.1 miles SW)
Hudson Heights, MD (3.4 miles E)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Broadway-Orleans Homes, MD (< 0.1 mile)
Frederick Douglass Homes, MD (< 0.1 mile)
Latrobe Homes, MD (< 0.1 mile)
Clarence Perkins Homes, MD (< 0.1 mile)
Old Town, MD (< 0.1 mile)
 Little Italy, MD (< 0.1 mile)
Butchers Hill, MD (< 0.1 mile)
Fells Point, MD (< 0.1 mile)
Mount Vernon, MD (1.4 miles WNW)
Mount Clare, MD (1.9 miles W)

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties / Independent Cities.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.

1 Keeping the above key concepts in mind, what we informally refer to as the "center" of a ZIP Code is most often actually the centroid of a polygon.