Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/MD/COUNTY/HOWARD

Howard County, MD ZIP codes

There are 24 ZIP codes in Howard County, MD, in 20 towns, from 20588 to 21797. The largest are 21043 (Ellicott City), 21044 (Columbia) and 21042 (Ellicott City). 1 more crosses into it from a neighbouring county: 21771.

The county seat is Ellicott City.

ZIP codes
24
Partly in it
1 more
Towns
20
County seat
Ellicott City
County FIPS
24027
Population
336,328
Median household income
$149,763
Land area
251 sq mi
Area codes
410, 443, 667

Howard County ZIP codes by town

Ellicott City (county seat)
21041, 21042, 21043

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.

ZIP codes partly in Howard County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Howard County.

Map of Howard County ZIP codes

205882070120723207592076320777207942102921036210412104221043210442104521046210752110421150217232173721738217652179421797

The ZIP codes of Howard 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.

Howard County in numbers

About 336,328 people live in Howard County, in 121,065 households, the 6th most populous of Maryland's 24 counties. The median household income is $149,763 a year, 44% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $597,900 (42% above the Maryland median), and median gross rent is $2,099 a month. The median age is 39.8; 64.5% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 29 minutes.

Population336,328Howard336,328
Households121,065Howard121,065
Median age39.8Howard39.8Maryland39.4US 38.9
Median household income$149,763Howard$149,763Maryland$103,678US $80,734
Median home value$597,900Howard$597,900Maryland$419,900US $332,700
Median gross rent$2,099Howard$2,099Maryland$1,705US $1,413
Bachelor's degree or higher64.5%Howard64.5%Maryland43.4%US 35.7%
Mean commute28.5 minHoward28.5 minMaryland31.1 minUS 26.4 min
Population density1,340 / sq miHoward1,340 / 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 Howard County

Largest towns in Howard County
TownZIP codesPopulation
Columbia 3 104,338
Ellicott City 3 75,257
Laurel 1 29,798
Elkridge 1 26,283
Clarksville 1 13,607
Jessup 1 9,931
Woodbine 1 8,643
Savage 1 8,239
Marriottsville 1 6,052
Fulton 1 5,677
Glenwood 1 3,696
Dayton 1 2,569
Glenelg 1 2,474
West Friendship 1 2,192
Highland 1 972

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 Howard County.

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

Every ZIP code in Howard County, with figures

ZIP codes in Howard County
ZIP City Type Population Median income Median home
20588 Dhs , MD No street area — — —
20701 Annapolis Junction , MD Standard 513 $85,594 —
20723 Laurel , MD Standard 36,866 $138,113 $525,400
20759 Fulton , MD Standard 6,624 $250,000+ $954,700
20763 Savage , MD Standard 2,601 $76,842 $419,200
20777 Highland , MD Standard 3,221 $226,146 $861,900
20794 Jessup , MD Standard 16,814 $116,406 $426,100
21029 Clarksville , MD Standard 13,607 $243,542 $912,100
21036 Dayton , MD Standard 2,569 $218,036 $881,300
21041 Ellicott City , MD No street area — — —
21042 Ellicott City , MD Standard 43,327 $190,061 $706,400
21043 Ellicott City , MD Standard 48,525 $148,125 $620,900
21044 Columbia , MD Standard 44,114 $135,057 $566,500
21045 Columbia , MD Standard 40,034 $118,563 $453,700
21046 Columbia , MD Standard 15,608 $127,813 $479,500
21075 Elkridge , MD Standard 37,363 $135,303 $455,300
21104 Marriottsville , MD Standard 6,052 $191,804 $680,200
21150 Simpsonville , MD No street area — — —
21723 Cooksville , MD Standard 669 $241,250 $1,005,500
21737 Glenelg , MD Standard 2,474 $250,000+ $996,400
21738 Glenwood , MD Standard 3,696 $250,000+ $914,300
21765 Lisbon , MD No street area — — —
21794 West Friendship , MD Standard 2,192 $231,466 $999,400
21797 Woodbine , MD Standard 8,643 $189,241 $735,600

Cite this page

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

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