HIO Views 10 meanings found HIO can mean the golf term hole‑in‑one, the city of Hillsboro, Oregon, a hockey program, a health information organization, or a university international office, depending on the setting. Medical Health Information Organization Miscellaneous Highly Intelligent Opening Homeschooling in O Homeschooling in Ohio Hole In One Academic & Science Harvard International Office Regional Hillsboro, Oregon USA Business High Income Opportunity Fund, Inc. Health Insuring Organization Sports Hockey Inside/Out