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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/MOUNTAIN-LAKE-PARK

Mountain Lake Park ZIP codes, Maryland

No ZIP code is named for Mountain Lake Park, MD; addresses there use a neighbouring town's name. The ZIP code covering it is 21550. Its area codes are 301, 240 and 227.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
2,167
Area codes
301, 240, 227

NANPA lists no telephone rate centre for Mountain Lake Park itself, so these are the area codes of the nearest one, Oakland (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Mountain Lake Park in numbers

About 2,167 people live in Mountain Lake Park, in 1,049 households. The median household income is $60,875 a year, 41% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $216,100 (49% below the Maryland median), and median gross rent is $736 a month. The median age is 43.5; 23.0% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 18 minutes.

Population2,167Mountain Lake Park2,167
Households1,049Mountain Lake Park1,049
Median age43.5Mountain Lake Park43.5Maryland39.4US 38.9
Median household income$60,875Mountain Lake Park$60,875Maryland$103,678US $80,734
Median home value$216,100Mountain Lake Park$216,100Maryland$419,900US $332,700
Median gross rent$736Mountain Lake Park$736Maryland$1,705US $1,413
Bachelor's degree or higher23.0%Mountain Lake Park23.0%Maryland43.4%US 35.7%
Mean commute17.6 minMountain Lake Park17.6 minMaryland31.1 minUS 26.4 min
Population density1,132 / sq miMountain Lake Park1,132 / sq mi

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

ZIP codes covering Mountain Lake Park

These ZIP codes cover part of Mountain Lake Park but are addressed as somewhere else.

ZIP codes overlapping Mountain Lake Park
ZIP City Type Population Median income Median home
21550 Oakland , MD Standard 13,691 $64,921 $233,300

Map of Mountain Lake Park ZIP codes

21550

The ZIP codes of Mountain Lake Park, 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 Mountain Lake Park

The nearest larger towns are Oakland (2,254 people, 1.6 mi), Kingwood, WV (2,973 people, 17 mi) and Keyser, WV (4,857 people, 21 mi).

Towns near Mountain Lake Park
TownPopulationDistance
Kingwood, WV 2,973 16.8 mi
Keyser, WV 4,857 21.5 mi
Frostburg 6,977 29.8 mi

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

Cite this page

zipcodes.pro. “Mountain Lake Park, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/mountain-lake-park

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