A single First-Class domestic postcard stamp is $0.61 .

If your postcard is larger than 4.25" x 6", it is automatically classified as a letter and will cost the standard letter rate ($0.78).

Go straight to the source by visiting the USPS Postal Store

If you need to drop your postcards in the mail today, skip the shipping delay and buy them locally. Postcard Stamp Cost 2026: $0.61 Single, $0.247 Bulk

The current price for a standard domestic .