Hallettsville High School serves students in grades 9 through 12. The school offers classes in English, math, social studies and fine arts. It provides guidance counseling services and maintains an administration department. The school offers membership options in the Future Farmers of America, National Honor Society, and the Future Scientists of America. Hallettsville High School also provides several sports activities, such as volleyball, basketball, tennis, and track and field. It offers various extracurricular activities that include band and graphic arts. The school additionally has a school health advisory council. Hallettsville High School is a part of the Hallettsville Independent School District.