| City: | Lineboro, Maryland |
| City Alias: | Manchester |
| County: | Carroll County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:58:52 PM |
| Population: | No Population Data |
| Area Codes: | 410 / 443 |
| Classification: | PO Box |
| Coordinates: | 39.7139, -76.8368 |
| Quick Link: |
ZIP code 21088 serves Lineboro, Maryland, a small community in Carroll County. This is a PO Box-only ZIP code with no street delivery routes. The post office handles mail for the area, though the exact residential count isn't reflected in available population data.
Lineboro is located in northern Carroll County near the Pennsylvania border. The post office facility here doesn't offer city carrier delivery. Manchester also appears as an alternate name for this ZIP code, though Manchester has its own primary post office designation. Residents in the 21088 service area use PO Boxes for mail delivery.
No street delivery records exist for this ZIP code. All mail service is provided through PO Boxes at the post office.
ZIP Code 21088 supports both business and residential activity. According to the Business Census (2024), there are 3 business establishments, employing about 10 people with an annual payroll of $400,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 0Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 3Source: CBP |
| 1st Quarter Payroll: | $94,000Source: CBP |
| Annual Payroll: | $400,000Source: CBP |
| # of Employees: | 10Source: CBP |
ZIP Code 21088 is located in Carroll County, Maryland, within the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area (CBSA 12580). This Metro area has a population of 2,710,489 people, about 0.00% of whom live in ZIP Code 21088. 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: | No DistrictsSource: USPS |
| Congressional Land Area: | sq miSource: Census |
| PMSA: | Baltimore, MD PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 21088 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.