ZIP Code 21104

Marriottsville, Maryland

ZIP Code Information

ZIP Code21104
City Marriottsville
State Maryland (MD)
CountyCarroll
Timezone America/New_York (UTC-4) Details
Area Codes (state) 301, 410, 443 Details
Population 4,614 Details
Median Household Income $130,893 Demographics

Population and income figures: US Census Bureau, 2012–2016 ACS 5-year estimates.

ZIP code 21104 is the delivery code the USPS assigns to Marriottsville, Maryland. The ZIP lies within Carroll County. Clocks here follow the America/New_York time zone (UTC-4).

About 4,614 people live in this ZIP code, and the median household income is roughly $130,893 a year. Figures come from the U.S. Census Bureau American Community Survey and are refreshed as new five-year estimates are released.

What you can do with ZIP code 21104

  • Write a mailing address: Marriottsville, MD 21104. The ZIP goes last, after the state abbreviation.
  • Check whether a shipping or delivery quote applies to this area — most US carriers price by ZIP code rather than by city.
  • Look up the local time zone before scheduling a call — the ZIP tells you which zone applies to that address.
  • Compare the ZIP with neighbouring codes to see how population and income shift block by block.

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Nearby ZIP Codes

Radius search
ZIP CodeCityDistance
21163 Woodstock 6.1 km Distance
21794 West Friendship 6.4 km Distance
21723 Cooksville 8 km Distance
21042 Ellicott City 8.2 km Distance
21738 Glenwood 10.6 km Distance
21133 Randallstown 10.7 km Distance
21244 Windsor Mill 11 km Distance
21041 Ellicott City 11.2 km Distance
21150 Simpsonville 11.2 km Distance
21737 Glenelg 12.7 km Distance

Frequently Asked Questions

ZIP code 21104 is located in Marriottsville, Maryland.

ZIP code 21104 is in Carroll county, Maryland.

ZIP code 21104 is in the America/New_York timezone.