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/COCKEYSVILLE

Cockeysville ZIP code, Maryland

The ZIP code for Cockeysville, MD is 21030, and its area codes are 410, 443 and 667.

USPS city name
1 ZIP code
Overlapping the city
3 more
Population
23,962
Area codes
410, 443, 667

Mail addressed to Cockeysville uses the ZIP code above. 3 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Cockeysville in numbers

About 23,962 people live in Cockeysville, in 10,624 households. The median household income is $77,680 a year, 25% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $419,900 (about the same as the Maryland median), and median gross rent is $1,603 a month. The median age is 34.9; 47.8% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 24 minutes.

Population23,962Cockeysville23,962
Households10,624Cockeysville10,624
Median age34.9Cockeysville34.9Maryland39.4US 38.9
Median household income$77,680Cockeysville$77,680Maryland$103,678US $80,734
Median home value$419,900Cockeysville$419,900Maryland$419,900US $332,700
Median gross rent$1,603Cockeysville$1,603Maryland$1,705US $1,413
Bachelor's degree or higher47.8%Cockeysville47.8%Maryland43.4%US 35.7%
Mean commute23.9 minCockeysville23.9 minMaryland31.1 minUS 26.4 min
Population density2,001 / sq miCockeysville2,001 / sq mi

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

ZIP codes addressed as Cockeysville

ZIP codes with the USPS city name Cockeysville
ZIP City Type Population Median income Median home
21030 Cockeysville , MD Standard 25,827 $89,015 $450,700

Other ZIP codes overlapping Cockeysville

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

ZIP codes overlapping Cockeysville
ZIP City Type Population Median income Median home
21031 Hunt Valley , MD Standard 26 — —
21093 Lutherville Timonium , MD Standard 39,100 $125,528 $477,700
21131 Phoenix , MD Standard 7,141 $197,619 $686,000

Map of Cockeysville ZIP codes

21030

The ZIP codes of Cockeysville, 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 Cockeysville

The nearest larger towns are Towson (58,679 people, 5.8 mi), Pikesville (33,524 people, 7.0 mi) and Carney (28,343 people, 7.7 mi).

Towns near Cockeysville
TownPopulationDistance
Timonium 10,304 2.7 mi
Mays Chapel 16,066 2.9 mi
Lutherville 6,574 3.8 mi
Hampton 5,372 5.0 mi
Towson 58,679 5.8 mi
Pikesville 33,524 7.0 mi
Carney 28,343 7.7 mi
Parkville 30,549 7.8 mi
Garrison 9,469 8.3 mi
Perry Hall 29,105 9.5 mi
Owings Mills 37,245 9.7 mi
Overlea 13,035 9.9 mi
Reisterstown 25,582 10.0 mi
Lochearn 27,074 10.4 mi

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

Cite this page

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

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