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/OAKLAND

Oakland ZIP code, Maryland

The ZIP code for Oakland, MD is 21550, and its area codes are 301, 240 and 227.

USPS city name
1 ZIP code
Population
2,254
Area codes
301, 240, 227

Oakland in numbers

About 2,254 people live in Oakland, in 1,086 households. The median household income is $53,289 a year, 49% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $244,400 (42% below the Maryland median), and median gross rent is $670 a month. The median age is 51.1; 29.3% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 16 minutes.

Population2,254Oakland2,254
Households1,086Oakland1,086
Median age51.1Oakland51.1Maryland39.4US 38.9
Median household income$53,289Oakland$53,289Maryland$103,678US $80,734
Median home value$244,400Oakland$244,400Maryland$419,900US $332,700
Median gross rent$670Oakland$670Maryland$1,705US $1,413
Bachelor's degree or higher29.3%Oakland29.3%Maryland43.4%US 35.7%
Mean commute16.0 minOakland16.0 minMaryland31.1 minUS 26.4 min
Population density831 / sq miOakland831 / sq mi

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

ZIP codes addressed as Oakland

ZIP codes with the USPS city name Oakland
ZIP City Type Population Median income Median home
21550 Oakland , MD Standard 13,691 $64,921 $233,300

Map of Oakland ZIP codes

21550

The ZIP codes of Oakland, 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 Oakland

The nearest larger towns are Kingwood, WV (2,973 people, 15 mi), Keyser, WV (4,857 people, 22 mi) and Brookhaven, WV (6,212 people, 29 mi).

Towns near Oakland
TownPopulationDistance
Kingwood, WV 2,973 15.4 mi
Keyser, WV 4,857 22.5 mi
Brookhaven, WV 6,212 28.8 mi
Cheat Lake, WV 10,902 29.2 mi

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

Cite this page

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

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