Suh was born in Portland, Oregon. He attended Grant High School in Portland, where he was a three-sport star in football, basketball, and track and field. He played as a two-way lineman for the Grant Generals. Suh earned first-team All-PIL honors on both offense and defense as a junior and was an honorable-mention All-state pick. In his senior year, he collected 65 tackles, including 10 sacks and recovered four fumbles, which earned him Parade magazine high school All-America honors, the 2004 Portland Interscholastic League Defensive Player of the Year, and a Class 4A first-team all-state selection. He also played in the 2005 U.S. Army All-American Bowl. In basketball, he earned honorable-mention All-League honors as a junior and senior.Also a track & field athlete, Suh was one of the state’s top performers in the shot put. He was the district shot put champion in 2004, and won the OSAA Class 4A shot put title in 2005 with a school-record throw of 18.71 meters (61 ft, 4 in). For his all-around athletic accomplishments, Suh was a finalist for the Portland Tribune’s Athlete of the Year. Suh was the sixth ranked defensive tackle in the United States.Recruited by many, Suh took official visits to Nebraska, Mississippi State, Oregon State, Miami (FL), and California, before committing to the Nebraska Cornhuskers on January 20, 2005.