21155 ZIP Code: Living in Upperco, MD

Updated November 2026 · Data: U.S. Census Bureau, American Community Survey 2020–2024

ZIP code 21155 is mostly in Baltimore County, with part in Carroll County, Maryland, and covers Upperco and Fowblesburg. Northwest Baltimore County farm country near the Carroll County line and Prettyboy Reservoir. About 3,313 people live in the 21155 ZIP code area.

21155 at a glance

Figures are Census estimates for ZIP Code Tabulation Area 21155, which closely follows the postal ZIP code. Estimates for smaller areas have wider margins of error.

Neighborhoods and communities in 21155

The 21155 ZIP code includes Upperco and Fowblesburg. ZIP code lines don’t always match neighborhood or school boundaries, so confirm the details for any specific address.

Homes in 21155: what the housing looks like

Housing in 21155 is mostly single-family detached homes. About 33% of homes were built before 1940, so expect older construction, plaster walls and period details. About 82% of occupied homes are lived in by their owners, which is higher than the Maryland average of about 67%.

Type of home	Share of homes in 21155
Single-family detached	90%
Townhomes and rowhomes (attached)	6%
2–4 unit buildings	1%
Buildings with 5+ units (apartments, condos)	1%
Mobile homes	2%

Share of all housing units, ACS 2020–2024. 1,229 housing units in total.

Commuting from 21155

Workers living in 21155 average a 30.6-minute commute. About 16.3% work from home. Here is how far the center of the 21155 ZIP code is from major job centers and travel hubs. These are straight-line distances; drive times depend on route and traffic.

Destination	Distance
Downtown Baltimore	22 miles
Washington, D.C.	48 miles
BWI Airport	28 miles
Annapolis	44 miles
Fort Meade	32 miles
Columbia Town Center	25 miles
Towson	16 miles

Living in Baltimore County: what to know

Baltimore County has no incorporated cities, so communities such as this one are governed by the county. Property taxes, schools, police and trash service all run through Baltimore County government.

Public schools in 21155 are run by Baltimore County Public Schools. Assignments go by street address, not ZIP code, so use the district’s school locator for a specific home. To compare schools, see the Maryland State Department of Education Report Card.

For taxes, commuting and lifestyle across the county, read our Baltimore County relocation guide. For parks and trails, see Baltimore County parks.

ZIP codes near 21155

• 21023 – Butler
• 21152 – Sparks Glencoe
• 21071 – Glyndon
• 21030 – Cockeysville
• 21120 – Parkton
• 21031 – Hunt Valley

21155 ZIP code: frequently asked questions

What county is ZIP code 21155 in?

ZIP code 21155 is mostly in Baltimore County, Maryland, with part in Carroll County.

What neighborhoods are in the 21155 ZIP code?

The 21155 ZIP code includes Upperco and Fowblesburg.

What is the median home value in 21155?

The median value of owner-occupied homes in 21155 is about $479,500, according to Census American Community Survey estimates for 2020–2024. Current asking prices can differ, so check active listings for today’s market.

How far is 21155 from Baltimore and Washington, D.C.?

The center of the 21155 ZIP code is about 22 miles from downtown Baltimore and 48 miles from Washington, D.C., in a straight line. Drive times vary with traffic.

Where can I see homes for sale in 21155?

You can see all current homes for sale in 21155 on GreatestMoves.com, our home search site, at https://www.greatestmoves.com/zip-codes/21155/.

Sources: U.S. Census Bureau, American Community Survey 5-year estimates 2020–2024 (tables DP03, DP04, DP05) for ZCTA 21155; U.S. Census Bureau TIGERweb ZCTA boundaries. Distances are calculated from the ZCTA’s internal point.