Marriottsville, MD ZIP code
The ZIP code for Marriottsville, Maryland is 21104. It is in Howard County.
- Population in these ZIPs
- 6,052
- Avg. median income
- $191,800population-weighted
- Typical home value
- $716,400population-weighted
- Metro area
- Baltimore-Columbia-Towson, MD
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Marriottsville, MD ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 21104 | 6,052 | $191,804 | $716,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Marriottsville
- Woodstock 4 mi
- West Friendship 4 mi
- Cooksville 5 mi
- Sykesville 5 mi
- Randallstown 6 mi
- Ellicott City 6 mi
- Windsor Mill 7 mi
- Reisterstown 7 mi
- Glenwood 8 mi
- Woodbine 8 mi
- Glenelg 9 mi
- Owings Mills 9 mi
Frequently asked questions
What is the ZIP code for Marriottsville, MD?
The ZIP code for Marriottsville, MD is 21104.
What county is Marriottsville, Maryland in?
Marriottsville ZIP codes are in Howard County.