ZIP code 21042
Where is ZIP code 21042?
Ellicott City, Maryland
Howard County · Standard ZIP code
ZIP code 21042 belongs to Ellicott City, Maryland in Howard County. 21042 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 410, 443 and 667. About 43,327 people live in the 21042 area, where the median household income is $190,061. The closest ZIP codes are 21043 (Ellicott City, 3.5 mi east), 21044 (Columbia, 4.1 mi south) and 21045 (Columbia, 4.9 mi south).
| ZIP code | 21042 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Ellicott City |
| State | Maryland (MD) |
| County | Howard County |
| Time zone | Eastern Time · now |
| Area codes | 410, 443, 667 |
| Coordinates | 39.2726, -76.8614 map |
| 3-digit prefix | 210 |
Population and income in 21042
| Population | 43,327 · higher than 93% of Maryland ZIP codes |
|---|---|
| People per square mile | 1,171 · higher than 67% of Maryland ZIP codes |
| Median age | 45.1 years · higher than 67% of Maryland ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $190,061 · higher than 93% of Maryland ZIP codes |
| Income per person | $77,643 |
| Below the poverty line | 3.3% |
| Bachelor’s degree or higher | 73% of adults 25+ |
| Median home value | $706,400 · higher than 91% of Maryland ZIP codes |
| Median rent | $2,183 a month |
| Housing units | 15,368 |
| Households | 15,099 (2.86 people on average) |
| Owners / renters | 85% / 15% |
| Land area | 37 sq mi (plus 0.17 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21042. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21042
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21043 | Ellicott City, MD | 3.5 mi E | Standard |
| 21044 | Columbia, MD | 4.1 mi S | Standard |
| 21045 | Columbia, MD | 4.9 mi S | Standard |
| 21041 | Ellicott City, MD | 5 mi SW | PO Box only |
| 21150 | Simpsonville, MD | 5 mi SW | PO Box only |
| 21104 | Marriottsville, MD | 5.1 mi NW | Standard |
| 21163 | Woodstock, MD | 5.4 mi N | Standard |
| 21794 | West Friendship, MD | 5.8 mi W | Standard |
| 21244 | Windsor Mill, MD | 5.8 mi NE | Standard |
| 21029 | Clarksville, MD | 6.4 mi SW | Standard |
| 21228 | Catonsville, MD | 6.5 mi E | Standard |
| 21046 | Columbia, MD | 7.1 mi S | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21042 or measure the distance to another ZIP code.
How to address mail to 21042
123 MAIN ST
ELLICOTT CITY MD 21042
Put the city, the two-letter state code and the ZIP code on the last line. Avoid Ellicott: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (21042-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Ellicott City, MD
All Ellicott City ZIP codes with population and income →
Questions
- What city is ZIP code 21042?
- 21042 is a Ellicott City, Maryland ZIP code.
- What county is 21042 in?
- ZIP code 21042 is in Howard County, Maryland.
- What time zone is ZIP code 21042 in?
- 21042 is in the Eastern Time zone (America/New_York).
- What area code is 21042?
- Phone numbers in ZIP code 21042 use area codes 410, 443 and 667.
- What is the population of ZIP code 21042?
- About 43,327 people live in ZIP code 21042, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21042?
- The median household income in 21042 is $190,061 a year, higher than 93% of Maryland ZIP codes.
- What ZIP codes are near 21042?
- The nearest ZIP codes to 21042 are 21043 (Ellicott City, 3.5 miles), 21044 (Columbia, 4.1 miles), 21045 (Columbia, 4.9 miles) and 21041 (Ellicott City, 5 miles).