Dubuque Senior High School (commonly Senior or DSHS) is a four-year public high school located in Dubuque, Iowa. It is one of three high schools in the Dubuque Community School District, and enrolls 1,447 students in grades 9-12. Senior was founded in 1858, and is the oldest secondary school in Dubuque. The school's mascot is the Ram; it competes at the state level in class 4A (which contains the state's largest schools) and is a member of the Mississippi Valley Athletic Conference.