OHS may refer to:
Medicine Obesity hypoventilation syndrome Occipital horn syndrome
Other Occupational health and safety Occupational Health Science, a scholarly journal published by the Society for Occupational Health Psychology Oh's, a brand of cereals Oracle HTTP Server Over head system, a power supply scheme for bumper cars
Organizations Ochsner Health System Office of Homeland Security, Office of the Executive Branch of the United States, precursor to the Department of Homeland Security Ohio Historical Society Oklahoma Historical Society Ontario Handweavers & Spinners Oregon Historical Society Oregon Humane, formerly known as the Oregon Humane Society Organ Historical Society, in Villanova, Pennsylvania, United States Ottawa Humane Society Oxford Harmonic Society
High schools Various countries Orange High School (disambiguation), various schools of this name Olympic High School (disambiguation), various schools of this name
Canada Oromocto High School, in Oromocto, New Brunswick
New Zealand Onehunga High School, in Auckland
United Kingdom Oriel High School, in Crawley, West Sussex, England Oxford High School, in Oxford, Oxfordshire, England
United States Oakland High School, in Oakland, California Oakmont High School, in Antelope, California Oakton High School, in Vienna, Virginia Oceanside High School, in Oceanside, California Odessa High School (New York), in Odessa, New York Odessa High School, in Odessa, Texas Odessa High School (Washington), in Odessa, Washington Ogden High School (Utah), in Ogden, Utah Olympian High School, in San Diego County, California Olympic High School, in Charlotte, North Carolina Opelika High School, in Opelika, Alabama Orem High School, in Orem, Utah Orion High School, in Orion, Illinois Osborne High School, in Marietta, Georgia Ottawa Senior High School, in Ottawa, Kansas Ottumwa High School, in Ottumwa, Iowa Stanford Online High School, online school based in Redwood City, California Oswego High School, in Oswego Illinois Oswego High School, in Oswego, New York Overland High School, in Aurora, Colorado