If you have a printer, you can skip the trip to the post office: Stamps - USPS Store

Some local convenience stores, gas stations, or gift shops might sell individual stamps, though they may charge a small convenience fee. Current Pricing (as of 2026)

Postage rates typically change annually. For a standard 1-ounce letter, the current price for a is $0.78 . Single Forever Stamp $0.78

Valid for 1-oz letters forever, regardless of future price hikes. $0.61 For standard-sized postcards. International Stamp $1.70 For standard 1-oz letters sent globally. Print Your Own Online

Finding single stamps can be tricky since most retailers—like grocery stores or pharmacies—only sell them in full books. If you only need one or two, here is exactly where to look and how much you can expect to pay.