Post offices in the county of Mercer, NJ
Use this page to find the post offices in your county that open earliest or stay open latest. The open hours listed are for the post office's retail hours, which means the hours in which a postal service employee is available at the counter to help with mailings and other services. Oftentimes lobbies are open extended hours, and you are able to check your PO box, drop off packages, or use the self-service APC machine to buy postage. The list below is first sorted alphabetically by city, then by post office name. Street View photos of post offices are shown when available. Please contact us if you find an error, so that we can correct it.
Cranbury Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 9:00 AM 5:00 PM Tuesday 9:00 AM 5:00 PM Wednesday 9:00 AM 5:00 PM Thursday 9:00 AM 5:00 PM Friday 9:00 AM 5:00 PM Saturday 9:00 AM 4:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-395-0748
Fax: 609-395-1772
Hightstown Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:30 AM 7:00 PM Tuesday 8:30 AM 7:00 PM Wednesday 8:30 AM 7:00 PM Thursday 8:30 AM 7:00 PM Friday 8:30 AM 7:00 PM Saturday 8:30 AM 4:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-448-0255
Fax: 609-371-0819
Hopewell Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:30 AM 11:30 AM 12:00 PM 4:30 PM Tuesday 8:30 AM 11:30 AM 12:00 PM 4:30 PM Wednesday 8:30 AM 11:30 AM 12:00 PM 4:30 PM Thursday 8:30 AM 11:30 AM 12:00 PM 4:30 PM Friday 8:30 AM 11:30 AM 12:00 PM 4:30 PM Saturday 8:30 AM 12:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-466-0462
Fax: 609-466-0646
Lawrenceville Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:30 AM 2:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-896-0181
Pennington Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 9:30 AM 5:00 PM Tuesday 9:30 AM 5:00 PM Wednesday 9:30 AM 5:00 PM Thursday 9:30 AM 5:00 PM Friday 9:30 AM 5:00 PM Saturday 9:00 AM 1:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-737-1115
Fax: 609-730-9097
Palmer Square New Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:30 AM 2:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-921-9563
Fax: 609-430-1175
Princeton Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 10:00 AM 4:30 PM Tuesday 10:00 AM 4:30 PM Wednesday 10:00 AM 4:30 PM Thursday 10:00 AM 4:30 PM Friday 10:00 AM 4:30 PM Saturday 8:30 AM 1:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-452-9044
Fax: 609-452-1853
Princeton Junction Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 10:00 AM 5:00 PM Tuesday 10:00 AM 5:00 PM Wednesday 10:00 AM 5:00 PM Thursday 10:00 AM 5:00 PM Friday 10:00 AM 5:00 PM Saturday 9:30 AM 3:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-799-1054
Fax: 609-799-3221
Titusville Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:15 AM 12:00 PM 1:00 PM 4:15 PM Tuesday 8:15 AM 12:00 PM 1:00 PM 4:15 PM Wednesday 8:15 AM 12:00 PM 1:00 PM 4:15 PM Thursday 8:15 AM 12:00 PM 1:00 PM 4:15 PM Friday 8:15 AM 12:00 PM 1:00 PM 4:15 PM Saturday 9:00 AM 12:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-737-2337
Fax: 609-737-2337
Circle Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:00 AM 4:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-771-0110
Fax: 609-883-6437
Downtown Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:00 AM 2:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-599-4050
Fax: 609-599-1162
Independence Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:30 AM 2:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-888-0114
Fax: 609-888-1334
Mercerville Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 5:00 PM Tuesday 8:00 AM 5:00 PM Wednesday 8:00 AM 5:00 PM Thursday 8:00 AM 5:00 PM Friday 8:00 AM 5:00 PM Saturday 8:00 AM 3:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-587-3573
Trenton Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 5:00 PM Tuesday 8:00 AM 5:00 PM Wednesday 8:00 AM 5:00 PM Thursday 8:00 AM 5:00 PM Friday 8:00 AM 6:30 PM Saturday 8:00 AM 3:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-581-3001
Fax: 609-581-9514
Trenton Carrier Annex Post Office does not have retail counter services
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-581-7607
Villa Park Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:00 AM 2:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-392-8900
Fax: 609-392-4522
West Trenton Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 4:30 PM Tuesday 8:00 AM 4:30 PM Wednesday 8:00 AM 4:30 PM Thursday 8:00 AM 4:30 PM Friday 8:00 AM 4:30 PM Saturday 8:00 AM 2:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-882-4845
Fax: 609-530-0521
Windsor Post Office is currently closed
For parking and list of services available, visit the official USPS page for post this post office location.
- Open hours
Day Open Close Monday 8:00 AM 1:00 PM 2:00 PM 4:30 PM Tuesday 8:00 AM 1:00 PM 2:00 PM 4:30 PM Wednesday 8:00 AM 1:00 PM 2:00 PM 4:30 PM Thursday 8:00 AM 1:00 PM 2:00 PM 4:30 PM Friday 8:00 AM 1:00 PM 2:00 PM 4:30 PM Saturday 9:00 AM 12:00 PM Sunday Closed - Buy postage online
- Discounted USPS and UPS rates of up to 84%.
- Promo code
- STAMPS100
$100 value
Phone: 609-448-6655