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/LA-PLATA

La Plata ZIP code, Maryland

The ZIP code for La Plata, MD is 20646, and its area codes are 240 and 301.

USPS city name
1 ZIP code
Population
10,683
Area codes
240, 301

La Plata in numbers

About 10,683 people live in La Plata, in 3,941 households. The median household income is $121,208 a year, 17% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $428,400 (about the same as the Maryland median), and median gross rent is $1,559 a month. The median age is 41.7; 35.4% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 40 minutes.

Population10,683La Plata10,683
Households3,941La Plata3,941
Median age41.7La Plata41.7Maryland39.4US 38.9
Median household income$121,208La Plata$121,208Maryland$103,678US $80,734
Median home value$428,400La Plata$428,400Maryland$419,900US $332,700
Median gross rent$1,559La Plata$1,559Maryland$1,705US $1,413
Bachelor's degree or higher35.4%La Plata35.4%Maryland43.4%US 35.7%
Mean commute39.6 minLa Plata39.6 minMaryland31.1 minUS 26.4 min
Population density1,338 / sq miLa Plata1,338 / sq mi

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

ZIP codes addressed as La Plata

ZIP codes with the USPS city name La Plata
ZIP City Type Population Median income Median home
20646 La Plata , MD Standard 21,400 $131,974 $450,200

Map of La Plata ZIP codes

20646

The ZIP codes of La Plata, 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 La Plata

The nearest larger towns are Bensville (15,848 people, 5.2 mi), Waldorf (82,943 people, 5.3 mi) and Accokeek (14,362 people, 9.3 mi).

Towns near La Plata
TownPopulationDistance
Bensville 15,848 5.2 mi
Waldorf 82,943 5.3 mi
Bryans Road 9,371 7.8 mi
Accokeek 14,362 9.3 mi
Brandywine 12,160 10.6 mi
Indian Head 4,055 10.7 mi
Fort Washington 25,134 13.2 mi
Mount Vernon, VA 13,122 13.8 mi
Fort Hunt, VA 16,700 14.1 mi
Clinton 38,376 14.8 mi
Dahlgren, VA 3,350 14.8 mi
Friendly 11,119 15.0 mi
Golden Beach 3,830 15.0 mi
Fort Belvoir, VA 8,449 15.0 mi

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

Cite this page

zipcodes.pro. “La Plata, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/la-plata

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