Made By: infused Web Design About Us: Hilliard Middle-Senior High School was founded in 1912 and is located in Hilliard, FL. We have a population of over 800 students, 400 in middle school (grades 6-8) and 400 in high school (grades 9-12). Nearly a third of our students are on the honor roll (All A or A-B). Our school colors are Red and White and our mascot, the Flash.