ZIP code 21788
Where is ZIP code 21788?
Thurmont, Maryland
Frederick County · Standard ZIP code
ZIP code 21788 belongs to Thurmont, Maryland in Frederick County. 21788 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 and 301. About 11,654 people live in the 21788 area, where the median household income is $98,856. The closest ZIP codes are 21778 (Rocky Ridge, 3.7 mi east), 21780 (Sabillasville, 6.2 mi northwest) and 21775 (New Midway, 6.4 mi southeast).
| ZIP code | 21788 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Thurmont |
| Also accepted | Graceham |
| State | Maryland (MD) |
| County | Frederick County |
| Time zone | Eastern Time · now |
| Area codes | 227, 240, 301 |
| Coordinates | 39.6109, -77.3989 map |
| 3-digit prefix | 217 |
Population and income in 21788
| Population | 11,654 · higher than 64% of Maryland ZIP codes |
|---|---|
| People per square mile | 178 · lower than 67% of Maryland ZIP codes |
| Median age | 44.6 years · higher than 65% of Maryland ZIP codes |
| Men / women | 51% / 49% |
| Median household income | $98,856 · lower than 55% of Maryland ZIP codes |
| Income per person | $52,036 |
| Below the poverty line | 8.6% |
| Bachelor’s degree or higher | 31% of adults 25+ |
| Median home value | $379,200 · lower than 60% of Maryland ZIP codes |
| Median rent | $959 a month |
| Housing units | 4,871 |
| Households | 4,649 (2.51 people on average) |
| Owners / renters | 82% / 18% |
| Land area | 65.45 sq mi (plus 0.51 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21788. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21788
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21778 | Rocky Ridge, MD | 3.7 mi E | Standard |
| 21780 | Sabillasville, MD | 6.2 mi NW | Standard |
| 21775 | New Midway, MD | 6.4 mi SE | PO Box only |
| 21759 | Ladiesburg, MD | 6.4 mi SE | PO Box only |
| 21727 | Emmitsburg, MD | 6.7 mi NE | Standard |
| 21757 | Keymar, MD | 7 mi SE | Standard |
| 21798 | Woodsboro, MD | 7.7 mi SE | Standard |
| 21719 | Cascade, MD | 7.8 mi NW | Standard |
| 21702 | Frederick, MD | 8.8 mi S | Standard |
| 21783 | Smithsburg, MD | 9.5 mi W | Standard |
| 21793 | Walkersville, MD | 9.5 mi S | Standard |
| 17214 | Blue Ridge Summit, PA | 9.7 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21788 or measure the distance to another ZIP code.
How to address mail to 21788
123 MAIN ST
THURMONT MD 21788
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts GRACEHAM as the city name for 21788. Adding the 4-digit ZIP+4 code (21788-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21788?
- 21788 is a Thurmont, Maryland ZIP code. Graceham is also accepted as the city name.
- What county is 21788 in?
- ZIP code 21788 is in Frederick County, Maryland.
- What time zone is ZIP code 21788 in?
- 21788 is in the Eastern Time zone (America/New_York).
- What area code is 21788?
- Phone numbers in ZIP code 21788 use area codes 227, 240 and 301.
- What is the population of ZIP code 21788?
- About 11,654 people live in ZIP code 21788, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21788?
- The median household income in 21788 is $98,856 a year, lower than 55% of Maryland ZIP codes.
- What ZIP codes are near 21788?
- The nearest ZIP codes to 21788 are 21778 (Rocky Ridge, 3.7 miles), 21780 (Sabillasville, 6.2 miles), 21775 (New Midway, 6.4 miles) and 21759 (Ladiesburg, 6.4 miles).