New Castle Post Office

does not have retail counter services

This USPS post office is located in New Castle, PA where the date and time is currently: 5/14/2026, 12:55:21 PM

Images

Stamps.com logo
Buy postage online
Discounted USPS and UPS rates of up to 84%.
Promo code
MAIL100
$100 value

Check package rates from 16108

Est. for 10×8×6 in package. Full calculator for exact rates.

Address

435 S Cascade St
New Castle, PA 16108-9989

Latitude: 40.994794, Longitude: -80.3191559

Get directions or buy postage

Get directions to New Castle Post Office
Current location to this post office
Skip the trip to New Castle Post Office
Buy discounted postage online
See nearby post offices that are still open
Downtown New Castle · Open
8:30 AM – 5:00 PM
1.5 mi
Neshannock · Open
8:30 AM – 5:00 PM
3.4 mi
West Pittsburg · Closed
9:00 AM – 12:00 PM, 1:00 PM – 4:00 PM
4.7 mi
Edinburg · Closed
8:00 AM – 12:00 PM, 1:00 PM – 3:00 PM
6.3 mi
Wampum · Closed
9:30 AM – 12:30 PM, 1:30 PM – 4:30 PM
7.4 mi
Volant · Closed
8:30 AM – 12:00 PM, 1:00 PM – 4:15 PM
8.7 mi
New Wilmington · Open
8:30 AM – 5:00 PM
8.8 mi
Ellwood City · Open
8:30 AM – 5:00 PM
9.6 mi
Pulaski · Closed
8:00 AM – 12:00 PM
10.1 mi
Enon Valley · Closed
8:30 AM – 11:30 AM, 1:00 PM – 4:00 PM
12.0 mi

Phone numbers

Link to Official USPS page for the New Castle post office.