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.

Street View Image of Cranbury Post Office in Cranbury, NJ

Cranbury Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
65 N Main St Cranbury , NJ 08512-9998

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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
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Street View Image of Hightstown Post Office in Hightstown, NJ

Hightstown Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
150 Mercer St Hightstown , NJ 08520-9998

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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
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Street View Image of Hopewell Post Office in Hopewell, NJ

Hopewell Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
9 S Greenwood Ave Hopewell , NJ 08525-9998

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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
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Street View Image of Lawrenceville Post Office in Lawrence Township, NJ

Lawrenceville Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1 Craven Ln Lawrence Township , NJ 08648-9998

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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

Phone: 609-896-0181

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Street View Image of Pennington Post Office in Pennington, NJ

Pennington Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
125 Broemel Pl Pennington , NJ 08534-9998

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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
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Street View Image of Palmer Square New Post Office in Princeton, NJ

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.

Post office address
259 Nassau St Ste 2 Princeton, NJ 08542-4609

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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
  • Stamps.com logo
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Street View Image of Princeton Post Office in Princeton, NJ

Princeton Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
Po Box Locker Princeton, NJ 08540-9998

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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
  • Stamps.com logo
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Street View Image of Princeton Junction Post Office in Princeton Junction, NJ

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.

Post office address
331 N Post Rd Princeton Junction , NJ 08550-9998

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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
  • Stamps.com logo
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Street View Image of Titusville Post Office in Titusville, NJ

Titusville Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1380 River Rd Titusville , NJ 08560-9998

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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
  • Stamps.com logo
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Street View Image of Circle Post Office in Trenton, NJ

Circle Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
2601 Brunswick Ave Trenton, NJ 08638-9998

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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
  • Stamps.com logo
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    Discounted USPS and UPS rates of up to 84%.
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Street View Image of Downtown Post Office in Trenton, NJ

Downtown Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
20 S Montgomery St Trenton, NJ 08608-9998

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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
  • Stamps.com logo
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    Discounted USPS and UPS rates of up to 84%.
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Street View Image of Independence Post Office in Trenton, NJ

Independence Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
2465 S Broad St Ste C2 Trenton, NJ 08610-9998

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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
  • Stamps.com logo
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    Discounted USPS and UPS rates of up to 84%.
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Street View Image of Mercerville Post Office in Trenton, NJ

Mercerville Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
339 Highway 33 Ste 2 Trenton, NJ 08619-9998

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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

Phone: 609-587-3573

  • Stamps.com logo
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    Discounted USPS and UPS rates of up to 84%.
    Promo code
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Street View Image of Trenton Post Office in Trenton, NJ

Trenton Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
680 Us Highway 130 Trenton, NJ 08650-9998

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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
  • Stamps.com logo
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    Discounted USPS and UPS rates of up to 84%.
    Promo code
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    $100 value
Street View Image of Trenton Carrier Annex Post Office in Trenton, NJ

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.

Post office address
435 Us Highway 130 Unit B Trenton, NJ 08620-9997

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Open hours
Day Open Close

Phone: 609-581-7607

  • Stamps.com logo
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Street View Image of Villa Park Post Office in Trenton, NJ

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.

Post office address
1137 Hamilton Ave Trenton, NJ 08629-9998

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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
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
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    $100 value
Street View Image of West Trenton Post Office in Trenton, NJ

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.

Post office address
555 Grand Ave Trenton, NJ 08628-9998

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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
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
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    $100 value
Street View Image of Windsor Post Office in Windsor, NJ

Windsor Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
39 S Main St Windsor , NJ 08561-9998

Get directions

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

Phone: 609-448-6655

  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
    STAMPS100
    $100 value