What city is ZIP code 08603?

08603 is a Trenton, New Jersey ZIP code.

What county is 08603 in?

ZIP code 08603 is in Mercer County, New Jersey.

What time zone is ZIP code 08603 in?

08603 is in the Eastern Time zone (America/New_York).

What area code is 08603?

Phone numbers in ZIP code 08603 use area code 609.

Can I use 08603 for a street address?

No. 08603 is only for PO Boxes. Street addresses in Trenton use 08608, 08609, 08610.

What ZIP codes are near 08603?

The nearest ZIP codes to 08603 are 08543 (Princeton, 0 miles), 08601 (Trenton, 0 miles), 08602 (Trenton, 0 miles) and 08604 (Trenton, 0 miles).

ZIP code 08603

Where is ZIP code 08603?

Trenton, New Jersey

Mercer County · PO Box only ZIP code

ZIP code 08603 belongs to Trenton, New Jersey in Mercer County. 08603 is a PO Box only ZIP code: it is used for post office boxes at the Trenton post office, not for street addresses. It is in the Eastern Time zone and uses area code 609. The closest ZIP codes are 08543 (Princeton, 0 mi north), 08601 (Trenton, 0 mi north) and 08602 (Trenton, 0 mi north).

ZIP code	08603
Type	PO Box only (no street delivery)
Status	Active
City	Trenton
State	New Jersey (NJ)
County	Mercer County
Time zone	Eastern Time · now
Area code	609
Coordinates	40.2805, -74.712 map
3-digit prefix	086

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 08603

ZIP code	City	Distance	Type
08543	Princeton, NJ	0 mi N	PO Box only
08601	Trenton, NJ	0 mi N	PO Box only
08602	Trenton, NJ	0 mi N	PO Box only
08604	Trenton, NJ	0 mi N	PO Box only
08605	Trenton, NJ	0 mi N	PO Box only
08606	Trenton, NJ	0 mi N	PO Box only
08607	Trenton, NJ	0 mi N	PO Box only
08625	Trenton, NJ	0 mi N	PO Box only
08645	Trenton, NJ	0 mi N	Unique
08646	Trenton, NJ	0 mi N	Unique
08647	Trenton, NJ	0 mi N	Unique
08650	Trenton, NJ	0 mi N	PO Box only

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 08603 or measure the distance to another ZIP code.

How to address mail to 08603

JANE SMITH
PO BOX 123
TRENTON NJ 08603

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (08603-XXXX) helps mail sort faster but isn’t required.

Other ZIP codes in Trenton, NJ

All Trenton ZIP codes with population and income →

Questions

What city is ZIP code 08603?: 08603 is a Trenton, New Jersey ZIP code.
What county is 08603 in?: ZIP code 08603 is in Mercer County, New Jersey.
What time zone is ZIP code 08603 in?: 08603 is in the Eastern Time zone (America/New_York).
What area code is 08603?: Phone numbers in ZIP code 08603 use area code 609.
Can I use 08603 for a street address?: No. 08603 is only for PO Boxes. Street addresses in Trenton use 08608, 08609, 08610.
What ZIP codes are near 08603?: The nearest ZIP codes to 08603 are 08543 (Princeton, 0 miles), 08601 (Trenton, 0 miles), 08602 (Trenton, 0 miles) and 08604 (Trenton, 0 miles).