| City: | Spring Gap, Maryland |
| County: | Allegany County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:23:30 AM |
| Population: | 35 [See All] |
| Area Codes: | 227 / 240 / 301 |
| Classification: | PO Box |
| Coordinates: | 39.5636, -78.7126 |
| Land Area: | 0.557 sq mi |
| Quick Link: |
Spring Gap is a small rural community in Allegany County, Maryland, where 35 residents rely entirely on PO Box mail service. The post office maintains 45 PO Boxes for just 14 local households, giving this location an adoption rate of 3.21—one of the highest in western Maryland. That high ratio isn't about local demand. It's about geography. Spring Gap serves as a regional mail hub for surrounding areas where street delivery doesn't exist.
The median age here is 56.5 years, reflecting an older, established population. All 35 residents are white, and the community consists entirely of single-family housing spread across a compact area. Rural carrier routes handle the minimal street delivery that exists—just one street, Oldtown Road, appears in the delivery records with only two ZIP+4 segments. For practical purposes, this is a PO Box community that happens to have a street address or two.
With only Oldtown Road in the delivery database, Spring Gap has virtually no street delivery infrastructure. The historic road name references the nearby town of Oldtown, MD, reflecting this area's position along early western Maryland settlement routes.
ZIP Code 21560 has 35 residents and 14 households (average 2.50 persons per household). The median age is 56.5 years, significantly older than the state (38.8) and significantly older than the nation (38.8). The gender split is 40.0% male and 60.0% female, which is much lower than the national male share (49.1%), making this a female-majority area. Largest groups are White (97.1%, much higher than the state average of 48.7% and well above the national average of 61.6%) and Black or African American (0.0%, much lower than the state average of 29.5% and well below the national average of 12.4%); Hispanic or Latino residents make up 0.0%, which is much lower than the national average (18.7%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 35Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 62.8 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 14Source: Census DHC |
| Average House Value: | $0Source: Census ACS |
| Persons Per Household: | 2.50Source: Census DHC |
| Average Family Size: | 2.50Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 35 | -- | -- | -- |
Median Age: 56.5
Male Median Age: 47.8
Female Median Age: 58.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 5 | 0 | 2 | 0 | 3 | 1 | 0 | 0 | 0 |
| Female | 0 | 0 | 3 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 6 | 3 | 0 | 2 | 0 | 3 | 0 |
| Total | 0 | 1 | 3 | 2 | 0 | 2 | 1 | 1 | 0 | 5 | 0 | 8 | 3 | 3 | 3 | 0 | 3 | 0 |
| White: | 34 | 100.00% |
| Black: | 0 | 0% |
| Hispanic:* | 0 | 0% |
| Asian: | 0 | 0% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 34 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 14 | 40.00% | 47.8 years |
| Females: | 21 | 60.00% | 58.5 years |
| Total: | 35 | 100% | 56.5 years |
| Native, born in the United States: | 0 | 0% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0% |
| Foreign born, naturalized U.S. citizen: | 0 | 0% |
| Foreign born, not a U.S. citizen: | 0 | 0% |
| Total Population: | 0 | 100% |
| Total Native Population: | 0 | 0% |
| Total Foreign-born Population: | 0 | 0% |
ZIP Code 21560 is designated for PO Box delivery only; business establishment and employment data are not available.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 90Source: 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 21560 is located in Allegany County, Maryland, within the Cumberland, MD-WV Metropolitan Statistical Area (CBSA 19060) and Maryland's 6th Congressional District. This Micro area has a population of 94,684 people, about 0.04% of whom live in ZIP Code 21560. It covers 0.557 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Cumberland, MD-WVSource: Census |
| CBSA Number: | 19060Source: Census |
| CBSA Type: | MicroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 94,684Source: Census |
| MSA: | Cumberland, MD-WV MSASource: Census |
| Land Area: | 0.557 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 06Source: USPS |
| Congressional Land Area: | 1950.26 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2474350Source: Census |
| Place Name: | Spring Gap CDP; MarylandSource: Census |
We could not locate which school district 21560 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 January 1, 2026.