No. The U.S. Postal Service observes Columbus Day on Monday, October 12, 2026, and all Post Office locations will be closed. There is no regular mail delivery or retail service that day, and both resume on Tuesday, October 13.
While Post Offices are closed, you can still use usps.com to buy stamps, order free boxes, print Click-N-Ship labels, and set up Hold Mail or a change of address. Self-service kiosks in select lobbies, many open 24 hours a day, can also print postage, weigh and mail packages, and sell stamps.
Source: USPS Newsroom, “U.S. Postal Service Will be Closed in Observance of Columbus Day, October 12” (October 5, 2026).
Image: Rockville Post Office in Rockville, Maryland, photo by G. Edward Johnson (CC BY 4.0), via Wikimedia Commons.