River Hill High School is a public high school in Clarksville, Maryland, United States. It is part of the Howard County public schools system. River Hill High School was awarded a "gold medal" by U.S. News & World Report. It was recognized by BusinessWeek as having the "Best Overall Academic Performance" in Maryland. It was also ranked 4th of 225 High Schools in the State of Maryland as of 2018. It was rated the 165th best school in the nation by US News in 2013.