Postal patrons in Guam and the Northern Marianas can join the rest of the nation in supporting breast cancer research by buying a postage stamp.
In April 2025, the Pacific Regional Central Cancer Registry released its report, “Cancer in the U.S.-Affiliated Pacific Islands 2007–2022,” which found breast cancer to be among the most frequently diagnosed cancers in women in Guam (881 cases) and the CNMI (133 cases) during that period.
Purchasing the breast cancer research semipostal stamp allows customers to contribute directly to efforts aimed at finding a cure. Sold at 90 cents, each stamp costs slightly more than the standard first-class mail rate, with the difference—minus USPS costs—donated to federal breast cancer research.
Since its debut in 1998, the stamp has generated nearly $98 million. Seventy percent of the proceeds benefit the National Institutes of Health, while 30 percent support the Department of Defense’s medical research program.
Authorized by Congress in 1997 and reauthorized through 2027 under the Stamp Out Breast Cancer Reauthorization Act of 2019, the Breast Cancer Research stamp holds the distinction of being the first semipostal stamp in U.S. history.
The stamps are available year-round in sheets of 20 and can be purchased at post offices nationwide, online at usps.com, through the USA Philatelic catalog, or by calling 800-STAMP-24 (800-782-6724).
USPS also offers three other semipostal stamps supporting national causes: Save Vanishing Species (2011), Alzheimer’s (2017), and Healing PTSD (2019). All four stamps are available year-round.
