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/RIVERSIDE

Riverside ZIP codes, Maryland

No ZIP code is named for Riverside, MD; addresses there use a neighbouring town's name. 3 ZIP codes cover it: 21015, 21001 and 21017. Its area codes are 667, 443 and 410.

USPS city name
0 ZIP codes
Overlapping the city
3 more
Population
6,585
Area codes
667, 443, 410

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

Riverside in numbers

About 6,585 people live in Riverside, in 2,687 households. The median household income is $105,785 a year, about the same as the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $246,100 (41% below the Maryland median), and median gross rent is $1,898 a month. The median age is 35.7; 39.5% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 31 minutes.

Population6,585Riverside6,585
Households2,687Riverside2,687
Median age35.7Riverside35.7Maryland39.4US 38.9
Median household income$105,785Riverside$105,785Maryland$103,678US $80,734
Median home value$246,100Riverside$246,100Maryland$419,900US $332,700
Median gross rent$1,898Riverside$1,898Maryland$1,705US $1,413
Bachelor's degree or higher39.5%Riverside39.5%Maryland43.4%US 35.7%
Mean commute31.1 minRiverside31.1 minMaryland31.1 minUS 26.4 min
Population density2,520 / sq miRiverside2,520 / sq mi

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

ZIP codes covering Riverside

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

ZIP codes overlapping Riverside
ZIP City Type Population Median income Median home
21001 Aberdeen , MD Standard 27,168 $83,238 $285,800
21015 Bel Air , MD Standard 30,013 $137,281 $443,400
21017 Belcamp , MD Standard 6,648 $106,831 $258,300

Map of Riverside ZIP codes

210012101521017

The ZIP codes of Riverside, 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 Riverside

The nearest larger towns are Bel Air South (58,137 people, 4.1 mi), Aberdeen (17,298 people, 4.4 mi) and Edgewood (24,922 people, 5.1 mi).

Towns near Riverside
TownPopulationDistance
Abingdon 5,019 2.0 mi
Bel Air South 58,137 4.1 mi
Aberdeen 17,298 4.4 mi
Edgewood 24,922 5.1 mi
Bel Air 10,585 6.7 mi
Joppatowne 14,237 7.4 mi
Pleasant Hills 3,836 8.1 mi
Havre de Grace 14,994 8.2 mi
Bel Air North 31,302 8.6 mi
Kingsville 4,687 10.2 mi
Fallston 10,013 11.1 mi
Honeygo 12,250 11.3 mi
Perryville 4,447 11.4 mi
White Marsh 10,932 13.4 mi

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

Cite this page

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

Underlying data is public domain or openly licensed — sources, vintages and licences.