Acorn High School is a public high school serving students in grades 7 through 12 and is located in Acorn, an unincorporated area in Polk County, Arkansas, United States, near Mena.

In addition to Acorn, the school serves a small section of the City of Mena.

[7] The assumed course of study that students complete is the Smart Core curriculum developed by the Arkansas Department of Education (ADE), which requires students to complete 22 units prior to graduation.

The school campus includes a 15 acres (6.1 ha) outdoor classroom that includes a vegetable garden and a greenhouse, and students established a protection program for an endangered Ozark Chinquapin tree discovered near the campus.

The Tigers compete in golf (boys/girls), bowling (boys/girls), cross country (boys/girls), basketball (boys/girls), cheer, tennis (boys/girls), baseball, softball, and track and field (boys/girls).