Dardanelle High School is a comprehensive public secondary school located in Dardanelle, Arkansas, United States, for students in grades nine through twelve. Dardanelle is the sole high school administered by the Dardanelle School District and serves three counties in the Arkansas River Valley area and as the main feeder school for Dardanelle Middle School. The school is known as the only high school with the Sand Lizard as its school mascot.