What city is ZIP code 21105?

21105 is a Maryland Line, Maryland ZIP code.

What county is 21105 in?

ZIP code 21105 is in Baltimore County, Maryland.

What time zone is ZIP code 21105 in?

21105 is in the Eastern Time zone (America/New_York).

What area code is 21105?

Phone numbers in ZIP code 21105 use area codes 410, 443 and 667.

What is the population of ZIP code 21105?

About 36 people live in ZIP code 21105, according to the Census Bureau’s American Community Survey (2020–2024).

Can I use 21105 for a street address?

No. 21105 is only for PO Boxes. Street addresses in Maryland Line use another ZIP code.

What ZIP codes are near 21105?

The nearest ZIP codes to 21105 are 17349 (New Freedom, 2.5 miles), 17361 (Shrewsbury, 3.5 miles), 21053 (Freeland, 3.5 miles) and 17355 (Railroad, 3.8 miles).

ZIP code 21105

Where is ZIP code 21105?

Maryland Line, Maryland

Baltimore County · PO Box only ZIP code

ZIP code 21105 belongs to Maryland Line, Maryland in Baltimore County. 21105 is a PO Box only ZIP code: it is used for post office boxes at the Maryland Line post office, not for street addresses. It is in the Eastern Time zone and uses area codes 410, 443 and 667. About 36 people live in the 21105 area. The closest ZIP codes are 17349 (New Freedom, 2.5 mi northwest), 17361 (Shrewsbury, 3.5 mi north) and 21053 (Freeland, 3.5 mi west).

ZIP code	21105
Type	PO Box only (no street delivery)
Status	Active
City	Maryland Line
State	Maryland (MD)
County	Baltimore County
Time zone	Eastern Time · now
Area codes	410, 443, 667
Coordinates	39.7114, -76.6595 map
3-digit prefix	211

Population and income in 21105

Population	36 · lower than 98% of Maryland ZIP codes
People per square mile	419 · higher than 52% of Maryland ZIP codes
Men / women	39% / 61%
Income per person	$0
Below the poverty line	0.0%
Bachelor’s degree or higher	39% of adults 25+
Housing units	14
Households	14 (2.57 people on average)
Owners / renters	0.0% / 100%
Land area	0.09 sq mi

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21105. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.

ZIP codes near 21105

ZIP code	City	Distance	Type
17349	New Freedom, PA	2.5 mi NW	Standard
17361	Shrewsbury, PA	3.5 mi N	Standard
21053	Freeland, MD	3.5 mi W	Standard
17355	Railroad, PA	3.8 mi NW	PO Box only
21120	Parkton, MD	4.8 mi S	Standard
17363	Stewartstown, PA	5.3 mi NE	Standard
21161	White Hall, MD	6 mi SE	Standard
17327	Glen Rock, PA	6.7 mi NW	Standard
17329	Glenville, PA	8.9 mi W	Standard
17352	New Park, PA	8.9 mi E	Standard
17322	Felton, PA	9.3 mi N	Standard
21088	Lineboro, MD	9.8 mi W	PO Box only

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21105 or measure the distance to another ZIP code.

How to address mail to 21105

JANE SMITH
PO BOX 123
MARYLAND LINE MD 21105

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21105-XXXX) helps mail sort faster but isn’t required.

Questions

What city is ZIP code 21105?: 21105 is a Maryland Line, Maryland ZIP code.
What county is 21105 in?: ZIP code 21105 is in Baltimore County, Maryland.
What time zone is ZIP code 21105 in?: 21105 is in the Eastern Time zone (America/New_York).
What area code is 21105?: Phone numbers in ZIP code 21105 use area codes 410, 443 and 667.
What is the population of ZIP code 21105?: About 36 people live in ZIP code 21105, according to the Census Bureau’s American Community Survey (2020–2024).
Can I use 21105 for a street address?: No. 21105 is only for PO Boxes. Street addresses in Maryland Line use another ZIP code.
What ZIP codes are near 21105?: The nearest ZIP codes to 21105 are 17349 (New Freedom, 2.5 miles), 17361 (Shrewsbury, 3.5 miles), 21053 (Freeland, 3.5 miles) and 17355 (Railroad, 3.8 miles).