Caroline County, Maryland ZIP codes
10 ZIP codes are in Caroline County, plus 2 that cross in from neighboring counties.
- ZIP codes
- 10
- Population in these ZIPs
- 32,942
- Avg. median income
- $72,500population-weighted
- Cities & towns
- 10
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Caroline County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 21609 PO Box | Bethlehem | — | — | — |
| 21629 | Denton | 10,252 | $73,956 | $358,200 |
| 21632 | Federalsburg | 6,436 | $61,316 | $241,500 |
| 21636 | Goldsboro | 1,097 | $73,426 | $333,800 |
| 21639 | Greensboro | 4,682 | $62,772 | $310,100 |
| 21640 | Henderson | 1,163 | $53,558 | $396,100 |
| 21641 | Hillsboro | 127 | $66,875 | $254,200 |
| 21655 | Preston | 5,053 | $90,385 | $334,300 |
| 21660 | Ridgely | 4,132 | $80,469 | $364,800 |
| 21670 PO Box | Templeville | — | — | — |
ZIP codes partly in Caroline County
These ZIP codes are mostly in a neighboring county but cover part of Caroline County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 21649 | Marydel | Queen Anne's County | 1,890 | $68,542 | $313,700 |
| 21657 | Queen Anne | Queen Anne's County | 1,354 | $104,940 | $465,900 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Caroline County
Nearby counties
Frequently asked questions
How many ZIP codes are in Caroline County, Maryland?
10 ZIP codes are mainly in Caroline County, and 2 more ZIP codes from neighboring areas reach partly into it.
What cities are in Caroline County?
ZIP codes in Caroline County use the city names Bethlehem, Denton, Federalsburg, Goldsboro, Greensboro, Henderson, Hillsboro, Preston, Ridgely and Templeville.