Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/MD/PRESTON

Preston ZIP code, Maryland

The ZIP code for Preston, MD is 21655, and its area codes are 667 and 410.

USPS city name
1 ZIP code
Population
852
Area codes
667, 410

Preston in numbers

About 852 people live in Preston, in 290 households. The median household income is $100,000 a year, 4% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $267,000 (36% below the Maryland median), and median gross rent is $1,629 a month. The median age is 38.6; 25.2% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 27 minutes.

Population852Preston852
Households290Preston290
Median age38.6Preston38.6Maryland39.4US 38.9
Median household income$100,000Preston$100,000Maryland$103,678US $80,734
Median home value$267,000Preston$267,000Maryland$419,900US $332,700
Median gross rent$1,629Preston$1,629Maryland$1,705US $1,413
Bachelor's degree or higher25.2%Preston25.2%Maryland43.4%US 35.7%
Mean commute27.0 minPreston27.0 minMaryland31.1 minUS 26.4 min
Population density1,552 / sq miPreston1,552 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Preston town. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Preston

ZIP codes with the USPS city name Preston
ZIP City Type Population Median income Median home
21655 Preston , MD Standard 5,053 $90,385 $289,200

Map of Preston ZIP codes

21655

The ZIP codes of Preston, MD, 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.

Towns near Preston

The nearest larger towns are Hurlock (2,819 people, 6.2 mi), Federalsburg (2,837 people, 7.4 mi) and Trappe (1,055 people, 8.4 mi).

Towns near Preston
TownPopulationDistance
Hurlock 2,819 6.2 mi
Federalsburg 2,837 7.4 mi
Easton 17,308 9.9 mi
Denton 4,936 12.5 mi
Cambridge 13,152 14.1 mi
Seaford, DE 8,485 16.3 mi
Bridgeville, DE 2,745 16.5 mi
Greensboro 2,634 19.2 mi
Laurel, DE 4,152 20.5 mi
Grasonville 3,564 23.1 mi
Harrington, DE 3,838 23.3 mi
Centreville 4,761 24.4 mi
Delmar 4,261 26.4 mi
Chester 4,797 26.8 mi

More nearby: every ZIP code in Caroline County · Maryland ZIP codes

Cite this page

zipcodes.pro. “Preston, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/preston

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