ZIP code 21111
Where is ZIP code 21111?
Monkton, Maryland
Baltimore County · Standard ZIP code
ZIP code 21111 belongs to Monkton, Maryland in Baltimore County. 21111 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 4,714 people live in the 21111 area, where the median household income is $136,304. The closest ZIP codes are 21152 (Sparks Glencoe, 4.8 mi west), 21131 (Phoenix, 5.8 mi south) and 21065 (Hunt Valley, 6.2 mi southwest).
| ZIP code | 21111 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Monkton |
| Also accepted | Hereford |
| State | Maryland (MD) |
| County | Baltimore County |
| Time zone | Eastern Time · now |
| Area codes | 410, 443, 667 |
| Coordinates | 39.5662, -76.5979 map |
| 3-digit prefix | 211 |
Population and income in 21111
| Population | 4,714 · lower than 51% of Maryland ZIP codes |
|---|---|
| People per square mile | 133 · lower than 72% of Maryland ZIP codes |
| Median age | 48.7 years · higher than 78% of Maryland ZIP codes |
| Men / women | 52% / 48% |
| Median household income | $136,304 · higher than 73% of Maryland ZIP codes |
| Income per person | $69,759 |
| Below the poverty line | 6.3% |
| Bachelor’s degree or higher | 64% of adults 25+ |
| Median home value | $607,200 · higher than 82% of Maryland ZIP codes |
| Median rent | $1,359 a month |
| Housing units | 1,939 |
| Households | 1,908 (2.47 people on average) |
| Owners / renters | 96% / 4.5% |
| Land area | 35.35 sq mi (plus 0.2 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21111. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21111
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21152 | Sparks Glencoe, MD | 4.8 mi W | Standard |
| 21131 | Phoenix, MD | 5.8 mi S | Standard |
| 21065 | Hunt Valley, MD | 6.2 mi SW | Unique |
| 21030 | Cockeysville, MD | 6.3 mi SW | Standard |
| 21013 | Baldwin, MD | 6.5 mi SE | Standard |
| 21120 | Parkton, MD | 6.6 mi NW | Standard |
| 21031 | Hunt Valley, MD | 6.7 mi SW | Standard |
| 21161 | White Hall, MD | 6.8 mi N | Standard |
| 21092 | Long Green, MD | 7.6 mi SE | PO Box only |
| 21084 | Jarrettsville, MD | 7.7 mi NE | Standard |
| 21023 | Butler, MD | 8.1 mi W | PO Box only |
| 21057 | Glen Arm, MD | 8.7 mi SE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21111 or measure the distance to another ZIP code.
How to address mail to 21111
123 MAIN ST
MONKTON MD 21111
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts HEREFORD as the city name for 21111. Adding the 4-digit ZIP+4 code (21111-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21111?
- 21111 is a Monkton, Maryland ZIP code. Hereford is also accepted as the city name.
- What county is 21111 in?
- ZIP code 21111 is in Baltimore County, Maryland.
- What time zone is ZIP code 21111 in?
- 21111 is in the Eastern Time zone (America/New_York).
- What area code is 21111?
- Phone numbers in ZIP code 21111 use area codes 410, 443 and 667.
- What is the population of ZIP code 21111?
- About 4,714 people live in ZIP code 21111, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21111?
- The median household income in 21111 is $136,304 a year, higher than 73% of Maryland ZIP codes.
- What ZIP codes are near 21111?
- The nearest ZIP codes to 21111 are 21152 (Sparks Glencoe, 4.8 miles), 21131 (Phoenix, 5.8 miles), 21065 (Hunt Valley, 6.2 miles) and 21030 (Cockeysville, 6.3 miles).