What city is ZIP code 21203?

21203 is a Baltimore, Maryland ZIP code.

What county is 21203 in?

ZIP code 21203 is in Baltimore City, Maryland.

What time zone is ZIP code 21203 in?

21203 is in the Eastern Time zone (America/New_York).

What area code is 21203?

Phone numbers in ZIP code 21203 use area code 410.

Can I use 21203 for a street address?

No. 21203 is only for PO Boxes. Street addresses in Baltimore use 21201, 21202, 21205.

What ZIP codes are near 21203?

The nearest ZIP codes to 21203 are 21233 (Baltimore, 0 miles), 21235 (Baltimore, 0 miles), 21241 (Baltimore, 0 miles) and 21263 (Baltimore, 0 miles).

ZIP code 21203

Where is ZIP code 21203?

Baltimore, Maryland

Baltimore City · PO Box only ZIP code

ZIP code 21203 belongs to Baltimore, Maryland in Baltimore City. 21203 is a PO Box only ZIP code: it is used for post office boxes at the Baltimore post office, not for street addresses. It is in the Eastern Time zone and uses area code 410. The closest ZIP codes are 21233 (Baltimore, 0 mi north), 21235 (Baltimore, 0 mi north) and 21241 (Baltimore, 0 mi north).

ZIP code	21203
Type	PO Box only (no street delivery)
Status	Active
City	Baltimore
State	Maryland (MD)
County	Baltimore City
Time zone	Eastern Time · now
Area code	410
Coordinates	39.2847, -76.6205 map
3-digit prefix	212

The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.

ZIP codes near 21203

ZIP code	City	Distance	Type
21233	Baltimore, MD	0 mi N	Standard
21235	Baltimore, MD	0 mi N	Unique
21241	Baltimore, MD	0 mi N	Unique
21263	Baltimore, MD	0 mi N	Unique
21264	Baltimore, MD	0 mi N	Unique
21270	Baltimore, MD	0 mi N	PO Box only
21273	Baltimore, MD	0 mi N	Unique
21275	Baltimore, MD	0 mi N	Unique
21278	Baltimore, MD	0 mi N	Unique
21279	Baltimore, MD	0 mi N	Unique
21281	Baltimore, MD	0 mi N	PO Box only
21289	Baltimore, MD	0 mi N	Unique

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21203 or measure the distance to another ZIP code.

How to address mail to 21203

JANE SMITH
PO BOX 123
BALTIMORE MD 21203

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21203-XXXX) helps mail sort faster but isn’t required.

Other ZIP codes in Baltimore, MD

All Baltimore ZIP codes with population and income →

Questions

What city is ZIP code 21203?: 21203 is a Baltimore, Maryland ZIP code.
What county is 21203 in?: ZIP code 21203 is in Baltimore City, Maryland.
What time zone is ZIP code 21203 in?: 21203 is in the Eastern Time zone (America/New_York).
What area code is 21203?: Phone numbers in ZIP code 21203 use area code 410.
Can I use 21203 for a street address?: No. 21203 is only for PO Boxes. Street addresses in Baltimore use 21201, 21202, 21205.
What ZIP codes are near 21203?: The nearest ZIP codes to 21203 are 21233 (Baltimore, 0 miles), 21235 (Baltimore, 0 miles), 21241 (Baltimore, 0 miles) and 21263 (Baltimore, 0 miles).