Carroll County, MD ZIP Codes
14 ZIP codes cover all or part of Carroll County, Maryland. The Census Bureau counts 175,321 residents in the county, with a median household income of $118,211 and a median home value of $434,000. Median household income ranges from $91,682 in 21787 to $191,804 in 21104. Its largest communities include Eldersburg, Westminster, Taneytown, Hampstead and Manchester.
Carroll County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 175,321 |
| Households | 64,285 |
| Median household income | $118,211 |
| Median home value | $434,000 |
| Median age | 41.3 |
| Median rent | $1,427 |
All 14 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 214,701 |
| Households (sum of ZIP codes) | 77,644 |
| Median household income, range across ZIP codes | $91,682 (21787) to $191,804 (21104) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $127,704 |
| Homeowners | 85.8% |
| Households with kids under 18 | 33.2% |
| Moved in the past year | 6.7% |
| Carrier routes in EDDM2GO's route library | 153 routes, 79,919 homes (14 of 14 ZIP codes) |
Top facts
- Highest median household income in Carroll County: 21104 ($191,804)
- Most residents: 21784 (39,258 people)
- Highest homeownership: 21048 (97.8% own their home)
- Most households with kids: 21784 (40.7% of households)
- Most new movers: 21776 (10.1% moved in last year)
- Youngest median age: 21155 (33.7 years)
- Highest median home value: 21797 ($735,600)
Every ZIP code in Carroll County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21784 | Sykesville | 39,258 | 13,416 | $139,395 | $491,800 | 87.3% | 40.7% | 5.6% | 26 | 15,795 | 82% of its land |
| 21157 | Westminster | 38,984 | 14,785 | $104,966 | $424,100 | 76.8% | 28.6% | 7.7% | 28 | 16,519 | 100% of its land |
| 21771 | Mount Airy | 33,031 | 11,226 | $157,302 | $556,200 | 94.0% | 35.1% | 9.7% | 20 | 11,600 | 26% of its land |
| 21158 | Westminster | 22,083 | 8,451 | $109,827 | $384,700 | 79.2% | 32.1% | 6.7% | 17 | 8,222 | 100% of its land |
| 21074 | Hampstead | 14,777 | 5,889 | $108,536 | $378,100 | 86.6% | 26.7% | 4.6% | 10 | 6,332 | 72% of its land |
| 21102 | Manchester | 12,162 | 4,413 | $135,069 | $392,800 | 89.4% | 29.7% | 2.3% | 8 | 4,392 | 77% of its land |
| 21787 | Taneytown | 11,645 | 4,431 | $91,682 | $355,000 | 78.4% | 34.8% | 7.4% | 9 | 4,781 | 87% of its land |
| 21048 | Finksburg | 10,481 | 3,723 | $131,921 | $459,000 | 97.8% | 33.0% | 4.0% | 8 | 4,314 | 100% of its land |
| 21797 | Woodbine | 8,643 | 2,849 | $189,241 | $735,600 | 91.7% | 36.9% | 5.4% | 7 | 3,409 | 32% of its land |
| 21776 | New Windsor | 6,261 | 2,346 | $133,409 | $461,600 | 93.2% | 29.7% | 10.1% | 5 | 2,136 | 79% of its land |
| 21104 | Marriottsville | 6,052 | 2,097 | $191,804 | $680,200 | 97.0% | 34.6% | 8.3% | 6 | 2,408 | 32% of its land |
| 21791 | Union Bridge | 5,340 | 1,968 | $93,015 | $379,800 | 81.7% | 34.5% | 5.7% | 4 | 1,858 | 39% of its land |
| 21155 | Upperco | 3,313 | 1,032 | $123,158 | $479,500 | 81.9% | 39.6% | 3.1% | 2 | 1,042 | 11% of its land |
| 21757 | Keymar | 2,671 | 1,018 | $100,500 | $466,100 | 82.4% | 23.1% | 9.3% | 3 | 1,123 | 52% of its land |
A ZIP code is listed for Carroll County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Eldersburg — 31,695 residents · 2 ZIP codes
- Westminster — 20,445 residents · 2 ZIP codes
- Taneytown — 7,932 residents · 1 ZIP code
- Hampstead — 6,251 residents · 1 ZIP code
- Manchester — 5,439 residents · 1 ZIP code
- Sykesville — 4,491 residents · 1 ZIP code
- New Windsor — 1,400 residents · 1 ZIP code
Rankings
- Richest ZIP codes in Carroll County — 14 ZIP codes ranked
- ZIP codes with the highest home values in Carroll County — 14 ZIP codes ranked
- ZIP codes with the highest homeownership in Carroll County — 14 ZIP codes ranked
- ZIP codes with the most families with kids in Carroll County — 14 ZIP codes ranked
- ZIP codes with the most new movers in Carroll County — 14 ZIP codes ranked
- Youngest ZIP codes in Carroll County — 14 ZIP codes ranked
- Oldest ZIP codes in Carroll County — 14 ZIP codes ranked
- Fastest-growing ZIP codes in Carroll County — 14 ZIP codes ranked
Price a mailing to Carroll County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Carroll County, MD?
- 21784, 21157, 21771, 21158, 21074, 21102, 21787, 21048, 21797, 21776, 21104, 21791, 21155 and 21757. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Carroll County?
- 175,321 residents in 64,285 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Carroll County?
- $118,211 for the county as a whole. Its ZIP codes range from $91,682 (21787) to $191,804 (21104).
- Which Carroll County ZIP code has the highest median household income?
- 21104, at $191,804, among ZIP codes with at least 1,000 residents. See the full ranking of Carroll County ZIP codes by income.
- How many carrier routes and mailboxes are in Carroll County?
- For the 14 of 14 ZIP codes in EDDM2GO's stored route library: 153 carrier routes reaching 79,919 residential and 4,028 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.