ZIP code 21737
Where is ZIP code 21737?
Glenelg, Maryland
Howard County · Standard ZIP code
ZIP code 21737 belongs to Glenelg, Maryland in Howard County. 21737 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 227, 240, 301, 410, 443 and 667. About 2,474 people live in the 21737 area, where the median household income is $250,001. The closest ZIP codes are 21738 (Glenwood, 1.7 mi north), 21036 (Dayton, 1.9 mi southeast) and 21794 (West Friendship, 3.9 mi northeast).
| ZIP code | 21737 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Glenelg |
| State | Maryland (MD) |
| County | Howard County |
| Time zone | Eastern Time · now |
| Area codes | 227, 240, 301, 410, 443, 667 |
| Coordinates | 39.2546, -77.0198 map |
| 3-digit prefix | 217 |
Population and income in 21737
| Population | 2,474 · lower than 62% of Maryland ZIP codes |
|---|---|
| People per square mile | 483 · higher than 54% of Maryland ZIP codes |
| Median age | 38.8 years · lower than 68% of Maryland ZIP codes |
| Men / women | 45% / 55% |
| Median household income | $250,001 · higher than 99% of Maryland ZIP codes |
| Income per person | $101,402 |
| Below the poverty line | 0.2% |
| Bachelor’s degree or higher | 76% of adults 25+ |
| Median home value | $996,400 · higher than 97% of Maryland ZIP codes |
| Housing units | 739 |
| Households | 739 (3.34 people on average) |
| Owners / renters | 93% / 6.8% |
| Land area | 5.12 sq mi (plus 0.05 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21737. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21737
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21738 | Glenwood, MD | 1.7 mi N | Standard |
| 21036 | Dayton, MD | 1.9 mi SE | Standard |
| 21794 | West Friendship, MD | 3.9 mi NE | Standard |
| 21041 | Ellicott City, MD | 4.4 mi E | PO Box only |
| 21150 | Simpsonville, MD | 4.4 mi E | PO Box only |
| 21723 | Cooksville, MD | 4.7 mi N | Standard |
| 21029 | Clarksville, MD | 4.7 mi SE | Standard |
| 20862 | Brinklow, MD | 4.9 mi S | Standard |
| 20833 | Brookeville, MD | 5.1 mi SW | Standard |
| 20777 | Highland, MD | 5.6 mi SE | Standard |
| 21765 | Lisbon, MD | 6.4 mi NW | PO Box only |
| 21797 | Woodbine, MD | 6.8 mi N | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21737 or measure the distance to another ZIP code.
How to address mail to 21737
123 MAIN ST
GLENELG MD 21737
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21737-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21737?
- 21737 is a Glenelg, Maryland ZIP code.
- What county is 21737 in?
- ZIP code 21737 is in Howard County, Maryland.
- What time zone is ZIP code 21737 in?
- 21737 is in the Eastern Time zone (America/New_York).
- What area code is 21737?
- Phone numbers in ZIP code 21737 use area codes 227, 240, 301, 410, 443 and 667.
- What is the population of ZIP code 21737?
- About 2,474 people live in ZIP code 21737, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21737?
- The median household income in 21737 is $250,001 a year, higher than 99% of Maryland ZIP codes.
- What ZIP codes are near 21737?
- The nearest ZIP codes to 21737 are 21738 (Glenwood, 1.7 miles), 21036 (Dayton, 1.9 miles), 21794 (West Friendship, 3.9 miles) and 21041 (Ellicott City, 4.4 miles).