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 — STATE/MD/COUNTY/BALTIMORE

Baltimore County, MD ZIP codes

There are 53 ZIP codes in Baltimore County, MD, in 45 towns, from 21013 to 21286. The largest are 21234 (Parkville), 21117 (Owings Mills) and 21222 (Dundalk).

The county seat is Towson.

ZIP codes
53
Towns
45
County seat
Towson
County FIPS
24005
Population
850,796
Median household income
$91,768
Land area
598 sq mi
Area codes
410, 443, 667

Baltimore County ZIP codes by town

Towson (county seat)
21204, 21252, 21284, 21285, 21286

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Baltimore County ZIP codes

2101321020210222102321027210302103121051210522105321057210652107121082210872109221093210942110521111211172112021128211312113321136211392115221153211552115621162211632120421207212082120921219212202122121222212272122821234212362123721244212502125221282212842128521286

The ZIP codes of Baltimore County, 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.

Baltimore County in numbers

About 850,796 people live in Baltimore County, in 332,801 households, the 3rd most populous of Maryland's 24 counties. The median household income is $91,768 a year, 11% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $349,300 (17% below the Maryland median), and median gross rent is $1,627 a month. The median age is 39.7; 42.3% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 28 minutes.

Population850,796Baltimore850,796
Households332,801Baltimore332,801
Median age39.7Baltimore39.7Maryland39.4US 38.9
Median household income$91,768Baltimore$91,768Maryland$103,678US $80,734
Median home value$349,300Baltimore$349,300Maryland$419,900US $332,700
Median gross rent$1,627Baltimore$1,627Maryland$1,705US $1,413
Bachelor's degree or higher42.3%Baltimore42.3%Maryland43.4%US 35.7%
Mean commute28.0 minBaltimore28.0 minMaryland31.1 minUS 26.4 min
Population density1,422 / sq miBaltimore1,422 / sq mi

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

Largest towns in Baltimore County

Largest towns in Baltimore County
TownZIP codesPopulation
Baltimore 2 573,243
Dundalk 1 65,969
Towson 5 58,679
Gwynn Oak 1 47,099
Catonsville 1 43,368
Essex 1 40,580
Nottingham 1 39,514
Lutherville Timonium 2 39,100
Windsor Mill 1 38,208
Owings Mills 1 37,245
Randallstown 1 35,957
Halethorpe 1 34,907
Pikesville 2 33,524
Middle River 1 31,712
Parkville 1 30,549

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Baltimore County.

Not sure you are in Baltimore County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Baltimore County, with figures

ZIP codes in Baltimore County
ZIP City Type Population Median income Median home
21013 Baldwin , MD Standard 5,610 $171,354 $572,100
21020 Boring , MD No street area — — —
21022 Brooklandville , MD No street area — — —
21023 Butler , MD Standard 66 $84,474 $881,600
21027 Chase , MD No street area — — —
21030 Cockeysville , MD Standard 25,827 $89,015 $450,700
21031 Hunt Valley , MD Standard 26 — —
21051 Fork , MD Standard 172 $232,721 $698,500
21052 Fort Howard , MD Standard 409 $77,300 $293,200
21053 Freeland , MD Standard 2,929 $89,497 $408,300
21057 Glen Arm , MD Standard 4,386 $145,924 $623,200
21065 Hunt Valley , MD No street area — — —
21071 Glyndon , MD Standard 404 $213,500 $450,500
21082 Hydes , MD Standard 626 $145,571 $485,500
21087 Kingsville , MD Standard 5,537 $129,188 $534,300
21092 Long Green , MD No street area — — —
21093 Lutherville Timonium , MD Standard 39,100 $125,528 $477,700
21094 Lutherville Timonium , MD No street area — — —
21105 Maryland Line , MD Standard 36 — —
21111 Monkton , MD Standard 4,714 $136,304 $607,200
21117 Owings Mills , MD Standard 62,816 $101,831 $387,400
21120 Parkton , MD Standard 7,440 $162,052 $580,900
21128 Perry Hall , MD Standard 15,501 $128,069 $449,500
21131 Phoenix , MD Standard 7,141 $197,619 $686,000
21133 Randallstown , MD Standard 31,398 $80,480 $322,800
21136 Reisterstown , MD Standard 32,088 $118,500 $422,100
21139 Riderwood , MD No street area — — —
21152 Sparks Glencoe , MD Standard 6,459 $121,350 $495,700
21153 Stevenson , MD Standard 456 $220,179 $902,300
21155 Upperco , MD Standard 3,313 $123,158 $479,500
21156 Upper Falls , MD Standard 204 — $793,800
21162 White Marsh , MD Standard 4,639 $157,813 $451,600
21163 Woodstock , MD Standard 7,539 $134,672 $602,800
21204 Towson , MD Standard 19,845 $99,606 $594,800
21207 Gwynn Oak , MD Standard 47,099 $67,060 $260,300
21208 Pikesville , MD Standard 37,276 $90,131 $337,900
21209 Baltimore , MD Standard 30,126 $91,437 $440,800
21219 Sparrows Point , MD Standard 9,565 $110,438 $384,600
21220 Middle River , MD Standard 42,824 $81,817 $300,100
21221 Essex , MD Standard 43,487 $67,340 $271,500
21222 Dundalk , MD Standard 59,407 $64,141 $215,900
21227 Halethorpe , MD Standard 34,907 $85,986 $289,400
21228 Catonsville , MD Standard 50,492 $112,656 $404,700
21234 Parkville , MD Standard 66,334 $83,517 $288,100
21236 Nottingham , MD Standard 39,514 $95,149 $327,200
21237 Rosedale , MD Standard 31,425 $91,693 $295,600
21244 Windsor Mill , MD Standard 38,208 $85,114 $282,600
21250 Baltimore , MD Standard 2,834 — —
21252 Towson , MD Standard 4,865 — —
21282 Pikesville , MD No street area — — —
21284 Towson , MD No street area — — —
21285 Towson , MD Standard 3 — —
21286 Towson , MD Standard 21,853 $93,808 $430,100

Cite this page

zipcodes.pro. “Baltimore County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/md/county/baltimore

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