| City: | Mayo, Maryland |
| County: | Anne Arundel County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:58:59 PM |
| Population: | No Population Data |
| Area Codes: | 227 / 301 / 410 |
| Classification: | PO Box |
| Coordinates: | 38.8877, -76.5125 |
| Quick Link: |
The ZIP's location between the Chesapeake Bay and the West River puts it in the heart of Maryland's waterfront corridor. Rural Route service covers the scattered residences, while the post office itself anchors a community that's technically classified as PO Box-only but actually has limited carrier delivery. The single named building in postal records is simply "POSTMASTER," indicating this is a straightforward rural post office without institutional facilities.
Mayo has minimal street infrastructure in postal records, with just Mayo Road serving as the primary route. This reflects the community's character as a small waterfront settlement where most mail service centers on the post office rather than distributed carrier routes.
ZIP Code 21106 supports both business and residential activity. According to the Business Census (2024), there are 5 business establishments, employing about 52 people with an annual payroll of $3,109,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 159Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 5Source: CBP |
| 1st Quarter Payroll: | $737,000Source: CBP |
| Annual Payroll: | $3,109,000Source: CBP |
| # of Employees: | 52Source: CBP |
ZIP Code 21106 is located in Anne Arundel County, Maryland, within the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area (CBSA 12580) and Maryland's 5th Congressional District. This Metro area has a population of 2,710,489 people, about 0.00% of whom live in ZIP Code 21106. 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: | 05Source: USPS |
| Congressional Land Area: | 1481.24 sq miSource: Census |
| PMSA: | Baltimore, MD PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2451575Source: Census |
| Place Name: | Mayo CDP; MarylandSource: Census |
We could not locate which school district 21106 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 February 1, 2026.