Carroll County, MD ZIP codes
There are 10 ZIP codes in Carroll County, MD, in 9 towns, from 21048 to 21787. The largest are 21784 (Sykesville), 21157 (Westminster) and 21158 (Westminster). 1 more crosses into it from a neighbouring county: 21771.
The county seat is Westminster.
- ZIP codes
- 10
- Partly in it
- 1 more
- Towns
- 9
- County seat
- Westminster
- County FIPS
24013- State
- Maryland
- Population
- 175,321
- Median household income
- $118,211
- Land area
- 448 sq mi
- Metro area
- Baltimore-Columbia-Towson
Carroll County ZIP codes by town
- Westminster (county seat)
- 21157, 21158
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Carroll County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Carroll County.
- 21771 Mount Airy · mostly in Frederick County
Map of Carroll County ZIP codes
The ZIP codes of Carroll County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Carroll County in numbers
About 175,321 people live in Carroll County, in 64,285 households, the 9th most populous of Maryland's 24 counties. The median household income is $118,211 a year, 14% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $434,000 (3% above the Maryland median), and median gross rent is $1,427 a month. The median age is 41.3; 40.7% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 34 minutes.
| Population | 175,321 |
|---|---|
| Households | 64,285 |
| Median age | 41.3 |
| Median household income | $118,211 |
| Median home value | $434,000 |
| Median gross rent | $1,427 |
| Bachelor's degree or higher | 40.7% |
| Mean commute | 34.4 min |
| Population density | 392 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Carroll County
| Town | ZIP codes | Population |
|---|---|---|
| Westminster | 2 | 20,445 |
| Finksburg | 1 | 10,481 |
| Taneytown | 1 | 7,932 |
| Hampstead | 1 | 6,251 |
| Manchester | 1 | 5,439 |
| Sykesville | 1 | 4,491 |
| Keymar | 1 | 2,671 |
| New Windsor | 1 | 1,400 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Carroll County.
Not sure you are in Carroll County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Carroll County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
21048 | Finksburg , MD | Standard | 10,481 | $131,921 | $459,000 |
21074 | Hampstead , MD | Standard | 14,777 | $108,536 | $378,100 |
21088 | Lineboro , MD | No street area | — | — | — |
21102 | Manchester , MD | Standard | 12,162 | $135,069 | $392,800 |
21157 | Westminster , MD | Standard | 38,984 | $104,966 | $424,100 |
21158 | Westminster , MD | Standard | 22,083 | $109,827 | $384,700 |
21757 | Keymar , MD | Standard | 2,671 | $100,500 | $466,100 |
21776 | New Windsor , MD | Standard | 6,261 | $133,409 | $461,600 |
21784 | Sykesville , MD | Standard | 39,258 | $139,395 | $491,800 |
21787 | Taneytown , MD | Standard | 11,645 | $91,682 | $355,000 |
Cite this page
zipcodes.pro. “Carroll County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/md/county/carroll
Underlying data is public domain or openly licensed — sources, vintages and licences.