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/SMITH-ISLAND

Smith Island ZIP codes, Maryland

No ZIP code is named for Smith Island, MD; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 21824 and 21866. Its area codes are 410, 443 and 667.

USPS city name
0 ZIP codes
Overlapping the city
2 more
Population
345
Area codes
410, 443, 667

NANPA lists no telephone rate centre for Smith Island itself, so these are the area codes of the nearest one, Crisfield (10.1 miles). A town on an area-code boundary can differ from its neighbour.

Smith Island in numbers

About 345 people live in Smith Island, in 176 households. The median household income is $90,385 a year, 13% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $109,200 (74% below the Maryland median). The median age is 52.1; 2.2% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 14 minutes.

Population345Smith Island345
Households176Smith Island176
Median age52.1Smith Island52.1Maryland39.4US 38.9
Median household income$90,385Smith Island$90,385Maryland$103,678US $80,734
Median home value$109,200Smith Island$109,200Maryland$419,900US $332,700
Bachelor's degree or higher2.2%Smith Island2.2%Maryland43.4%US 35.7%
Mean commute13.9 minSmith Island13.9 minMaryland31.1 minUS 26.4 min
Population density79 / sq miSmith Island79 / sq mi

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

ZIP codes covering Smith Island

These ZIP codes cover part of Smith Island but are addressed as somewhere else.

ZIP codes overlapping Smith Island
ZIP City Type Population Median income Median home
21824 Ewell , MD Standard 264 $90,288 $108,500
21866 Tylerton , MD Standard 81 $95,250 $177,500

Map of Smith Island ZIP codes

2182421866

The ZIP codes of Smith Island, 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 Smith Island

The nearest larger towns are Crisfield (2,499 people, 9.5 mi), Fairmount (440 people, 15 mi) and Nanticoke (434 people, 21 mi).

Towns near Smith Island
TownPopulationDistance
Princess Anne 3,569 24.0 mi
Pocomoke City 4,405 26.2 mi
Lexington Park 13,252 29.4 mi

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

Cite this page

zipcodes.pro. “Smith Island, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/smith-island

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