What city is ZIP code 21810?

21810 is a Allen, Maryland ZIP code.

What county is 21810 in?

ZIP code 21810 is in Wicomico County, Maryland.

What time zone is ZIP code 21810 in?

21810 is in the Eastern Time zone (America/New_York).

What area code is 21810?

Phone numbers in ZIP code 21810 use area codes 410, 443 and 667.

What is the population of ZIP code 21810?

About 55 people live in ZIP code 21810, according to the Census Bureau’s American Community Survey (2020–2024).

Can I use 21810 for a street address?

No. 21810 is only for PO Boxes. Street addresses in Allen use another ZIP code.

What ZIP codes are near 21810?

The nearest ZIP codes to 21810 are 21822 (Eden, 2.1 miles), 21826 (Fruitland, 4.3 miles), 21856 (Quantico, 6.2 miles) and 21853 (Princess Anne, 6.7 miles).

ZIP code 21810

Where is ZIP code 21810?

Allen, Maryland

Wicomico County · PO Box only ZIP code

ZIP code 21810 belongs to Allen, Maryland in Wicomico County. 21810 is a PO Box only ZIP code: it is used for post office boxes at the Allen post office, not for street addresses. It is in the Eastern Time zone and uses area codes 410, 443 and 667. About 55 people live in the 21810 area. The closest ZIP codes are 21822 (Eden, 2.1 mi east), 21826 (Fruitland, 4.3 mi northeast) and 21856 (Quantico, 6.2 mi northwest).

ZIP code	21810
Type	PO Box only (no street delivery)
Status	Active
City	Allen
State	Maryland (MD)
County	Wicomico County
Time zone	Eastern Time · now
Area codes	410, 443, 667
Coordinates	38.2873, -75.688 map
3-digit prefix	218

Population and income in 21810

Population	55 · lower than 97% of Maryland ZIP codes
People per square mile	116 · lower than 74% of Maryland ZIP codes
Median age	69.9 years · higher than 98% of Maryland ZIP codes
Men / women	36% / 64%
Income per person	$37,909
Below the poverty line	0.0%
Bachelor’s degree or higher	53% of adults 25+
Housing units	21
Households	21 (2.62 people on average)
Owners / renters	100% / 0.0%
Land area	0.48 sq mi (plus 0.01 sq mi of water)

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21810. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.

ZIP codes near 21810

ZIP code	City	Distance	Type
21822	Eden, MD	2.1 mi E	Standard
21826	Fruitland, MD	4.3 mi NE	Standard
21856	Quantico, MD	6.2 mi NW	Standard
21853	Princess Anne, MD	6.7 mi S	Standard
21801	Salisbury, MD	7.2 mi NE	Standard
21802	Salisbury, MD	7.7 mi NE	PO Box only
21803	Salisbury, MD	7.7 mi NE	PO Box only
21830	Hebron, MD	8 mi N	Standard
21865	Tyaskin, MD	8.6 mi W	Standard
21804	Salisbury, MD	9.4 mi NE	Standard
21814	Bivalve, MD	11 mi W	Standard
21840	Nanticoke, MD	11.7 mi W	Standard

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21810 or measure the distance to another ZIP code.

How to address mail to 21810

JANE SMITH
PO BOX 123
ALLEN MD 21810

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21810-XXXX) helps mail sort faster but isn’t required.

Questions

What city is ZIP code 21810?: 21810 is a Allen, Maryland ZIP code.
What county is 21810 in?: ZIP code 21810 is in Wicomico County, Maryland.
What time zone is ZIP code 21810 in?: 21810 is in the Eastern Time zone (America/New_York).
What area code is 21810?: Phone numbers in ZIP code 21810 use area codes 410, 443 and 667.
What is the population of ZIP code 21810?: About 55 people live in ZIP code 21810, according to the Census Bureau’s American Community Survey (2020–2024).
Can I use 21810 for a street address?: No. 21810 is only for PO Boxes. Street addresses in Allen use another ZIP code.
What ZIP codes are near 21810?: The nearest ZIP codes to 21810 are 21822 (Eden, 2.1 miles), 21826 (Fruitland, 4.3 miles), 21856 (Quantico, 6.2 miles) and 21853 (Princess Anne, 6.7 miles).