ZIP code 21664: Secretary, MD
21664 is a ZIP code in Secretary, Maryland, mainly in Dorchester County, part of the Cambridge, MD micro area. About 635 people live here.
- Population
- 635
- Median household income
- $82,721
- Typical home value
- $236,600+2.9% in 12 months
- Median rent
- $1,175gross, per month
- Median age
- 34
- Homeowners
- 70%of occupied homes
Shaded: ZIP code 21664's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 21664 details
| City | Secretary |
|---|---|
| State | Maryland |
| County | Dorchester County |
| Metro area | Cambridge, MD |
| Time zone | Eastern Time (UTC−5), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 0.3 sq mi, plus 0 sq mi of water |
| Population density | 2,190 people per sq mi |
| Bachelor's degree or higher | 20.3% of adults 25+ |
| Average commute | 25.4 minutes |
| Center coordinates | 38.60757, -75.94711 |
Median rent in 21664 by bedrooms
| Size | Median gross rent |
|---|---|
| 2 bedrooms | $688/mo |
| 3 bedrooms | $1,446/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 21664
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 21631 | East New Market, MD | 1.8 mi | 2,429 |
| 21643 | Hurlock, MD | 4.9 mi | 5,392 |
| 21835 | Linkwood, MD | 5.1 mi | 312 |
| 21673 | Trappe, MD | 5.7 mi | 2,843 |
| 21659 | Rhodesdale, MD | 8.2 mi | 1,601 |
| 21609 | Bethlehem, MD | 9.2 mi | — |
| 21655 | Preston, MD | 9.7 mi | 5,053 |
| 21613 | Cambridge, MD | 10.2 mi | 17,926 |
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
Buying a home in 21664?
A typical home in ZIP code 21664 is worth about $236,600 (Zillow Home Value Index). The median household here earns $82,721 a year. See what buying here would cost per month, with Maryland average taxes and insurance filled in.
Monthly payment for a $236,600 homeWhat can a $82,721 income afford?Rental property numbers
About ZIP code 21664
What city is ZIP code 21664?
ZIP code 21664 is in Secretary, MD, in Dorchester County.
What county is ZIP code 21664 in?
21664 is mainly in Dorchester County, Maryland.
What is the population of ZIP code 21664?
About 635 people live in ZIP code 21664, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 21664 in?
21664 is in Eastern Time (UTC−5). It observes daylight saving time.