Caroline County, MD ZIP codes
Caroline County ZIP codes by town
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.
Map of Caroline County ZIP codes
The ZIP codes of Caroline 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.
Caroline County in numbers
About 33,669 people live in Caroline County, in 12,495 households, the 20th most populous of Maryland's 24 counties. The median household income is $68,457 a year, 34% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $290,100 (31% below the Maryland median), and median gross rent is $1,105 a month. The median age is 39.9; 16.2% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 33 minutes.
| Population | 33,669 |
|---|---|
| Households | 12,495 |
| Median age | 39.9 |
| Median household income | $68,457 |
| Median home value | $290,100 |
| Median gross rent | $1,105 |
| Bachelor's degree or higher | 16.2% |
| Mean commute | 33.4 min |
| Population density | 105 / 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 Caroline County
| Town | ZIP codes | Population |
|---|---|---|
| Denton | 1 | 4,936 |
| Federalsburg | 1 | 2,837 |
| Greensboro | 1 | 2,634 |
| Ridgely | 1 | 1,772 |
| Preston | 1 | 852 |
| Goldsboro | 1 | 248 |
| Henderson | 1 | 132 |
| Hillsboro | 1 | 127 |
| Templeville | 1 | 63 |
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 Caroline County.
Not sure you are in Caroline County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Caroline County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
21609 | Bethlehem , MD | No street area | — | — | — |
21629 | Denton , MD | Standard | 10,252 | $73,956 | $334,200 |
21632 | Federalsburg , MD | Standard | 6,436 | $61,316 | $216,000 |
21636 | Goldsboro , MD | Standard | 1,097 | $73,426 | $320,000 |
21639 | Greensboro , MD | Standard | 4,682 | $62,772 | $269,400 |
21640 | Henderson , MD | Standard | 1,163 | $53,558 | $268,500 |
21641 | Hillsboro , MD | Standard | 127 | $66,875 | $254,200 |
21655 | Preston , MD | Standard | 5,053 | $90,385 | $289,200 |
21660 | Ridgely , MD | Standard | 4,132 | $80,469 | $359,300 |
21670 | Templeville , MD | No street area | — | — | — |
Cite this page
zipcodes.pro. “Caroline County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/md/county/caroline
Underlying data is public domain or openly licensed — sources, vintages and licences.