- James M. Slater Proton Treatment Center - Loma Linda, CA (Another Link Here)
- Midwest Proton Radiotherapy Institute (MPRI) - Bloomington, IN
- Francis H. Burr Proton Therapy Center - Massachusetts General Hospital - Harvard, Boston, MA
- M D Anderson Proton Therapy Center - Houston, TX
- University of Florida Proton Therapy Facility - Jacksonville, FL
- Procure Proton Therapy Center - Oklahoma City, OK
- Univ. of Pennsylvania Roberts Proton Therapy Center - Philadelphia, PA (Opens 2009)
- Northern Illinois University - West Chicago, IL (Opens 2011)
- Proton Therapy Center, National Cancer Center (NCC) - Seoul, South Korea
Exploring Proton Treatment for Prostate Cancer & other topics
- National Association for Proton Therapy - a resource center and the Voice of the Proton Community
- Benign Prostatic Hyperplasia - MSN Health Channel
- Brotherhood of the Balloon (BOB) - organization for patients who received Proton Therapy
- National Prostate Cancer Coalition - an advocacy organization dedicated to eliminating prostate cancer
- Us Too! - Prostate Cancer Education and Support
- OncoLink - Abramson Cancer Center of the University of Pennsylvania
- Don't Fear the Big Dogs - A book about one man's journey to Loma Linda
- Proton Beam Therapy Research - A Proton Advocacy site
- Proton Pals - a support and outreach group for M. D. Anderson patients