| City: | Baltimore, Maryland |
| Names to Avoid: | Social Security Admin |
| County: | Baltimore City County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 10:00:15 PM |
| Population: | No Population Data |
| Area Codes: | 227 / 301 / 410 / 443 / 667 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 39.2937, -76.6258 |
| Quick Link: |
The Social Security Administration operates a third Baltimore ZIP code 21290 from facilities in the Seton Hill neighborhood of Central Baltimore. This designation complements SSA's primary Woodlawn campus ZIPs (21235 and 21241), serving specific administrative or programmatic functions. SSA maintains one of the largest workforces in the Baltimore metropolitan area with over 11,500 employees regionwide, requiring multiple ZIP codes to manage correspondence and benefits distribution. This postal designation has served SSA for over two decades.
Postal records show 8 delivery codes and identify SSA offices on Greene Street within this 0.01-square-mile boundary. Census demographic data is not available, consistent with federal office operations. Baltimore serves as the valid mailing city for this designation.
| Residential: | 0 |
| Business: | 20 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 21290 is assigned to a single organization or institution. Detailed business demographics are not published for unique ZIP Codes.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 14Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 21290 is located in Baltimore City County, Maryland, within the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area (CBSA 12580) and Maryland's 7th Congressional District. This Metro area has a population of 2,710,489 people, about 0.00% of whom live in ZIP Code 21290. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Baltimore-Columbia-Towson, MDSource: Census |
| CBSA Number: | 12580Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 2,710,489Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 07Source: USPS |
| Congressional Land Area: | 488.03 sq miSource: Census |
| PMSA: | Baltimore, MD PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2404000Source: Census |
| Place Name: | Baltimore city; MarylandSource: Census |
We could not locate which school district 21290 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on March 1, 2026.