ZIP code 21042: Ellicott City, MD
21042 is a ZIP code in Ellicott City, Maryland, mainly in Howard County, part of the Baltimore-Columbia-Towson, MD metro area. About 43,327 people live here.
- Population
- 43,327
- Median household income
- $190,061
- Typical home value
- $797,000+1.5% in 12 months
- Median rent
- $2,183gross, per month
- Median age
- 45.1
- Homeowners
- 84.7%of occupied homes
Shaded: ZIP code 21042's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 21042 details
| City | Ellicott City |
|---|---|
| State | Maryland |
| County | Howard County |
| Metro area | Baltimore-Columbia-Towson, MD |
| Time zone | Eastern Time (UTC−5), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 37 sq mi, plus 0.2 sq mi of water |
| Population density | 1,171 people per sq mi |
| Bachelor's degree or higher | 72.9% of adults 25+ |
| Average commute | 28.6 minutes |
| Center coordinates | 39.27718, -76.89460 |
Median rent in 21042 by bedrooms
| Size | Median gross rent |
|---|---|
| Studio | $3,501/mo |
| 1 bedroom | $1,767/mo |
| 2 bedrooms | $2,162/mo |
| 3 bedrooms | $2,470/mo |
| 4 bedrooms | $2,719/mo |
| 5+ bedrooms | $3,501/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 21042
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 21041 | Ellicott City, MD | 3.8 mi | — |
| 21150 | Simpsonville, MD | 3.8 mi | — |
| 21794 | West Friendship, MD | 4.1 mi | 2,192 |
| 21163 | Woodstock, MD | 4.9 mi | 7,539 |
| 21104 | Marriottsville, MD | 4.9 mi | 6,052 |
| 21044 | Columbia, MD | 5.0 mi | 44,114 |
| 21043 | Ellicott City, MD | 5.2 mi | 48,525 |
| 21029 | Clarksville, MD | 5.6 mi | 13,607 |
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
Buying a home in 21042?
A typical home in ZIP code 21042 is worth about $797,000 (Zillow Home Value Index). The median household here earns $190,061 a year. See what buying here would cost per month, with Maryland average taxes and insurance filled in.
Monthly payment for a $797,000 homeWhat can a $190,061 income afford?Rental property numbers
About ZIP code 21042
What city is ZIP code 21042?
ZIP code 21042 is in Ellicott City, MD, in Howard County.
What county is ZIP code 21042 in?
21042 is mainly in Howard County, Maryland.
What is the population of ZIP code 21042?
About 43,327 people live in ZIP code 21042, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 21042 in?
21042 is in Eastern Time (UTC−5). It observes daylight saving time.