2025 Postage Rates Per Ounce Letter. Washington, dc — today, the united states postal service filed notice with the postal regulatory commission (prc) of mailing services price changes to take. Postcards sent domestically will be 56 cents, up from 53 cents.

Changes by usps for postcards, flats & letter size. Learn about the 2025 postage price change for usps services and products, and how it affects domestic and international mail.