2024 Postage Rates Per Ounce Usa. As of july 14, 2024. Postal service filed notice with the postal regulatory commission of mailing services price changes to take effect july 14,.

Washington, dc — today, the united states postal service filed notice with the postal regulatory commission (prc). Explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and optimize your mailing strategies.