Castle High School, previously known as John H. Castle High School is a public high school located about a mile northeast of Newburgh, Indiana on Indiana 261. Castle is one of three high schools in the Warrick County School Corporation. Until 2020, it was the only non-Evansville school that played in the Southern Indiana Athletic Conference as well as the largest high school in southwestern Indiana by enrollment. Castle High School offers classes in agriculture, art, business and computers, English, family and consumers science, industrial technology, mathematics, music and fine arts, physical education, science, social studies, resource education, and world languages. Castle also offers advance placement classes in English language, English literature, calculus, physics, chemistry, U.S. h