Arlington Senior High School is a public high school located in Saint Paul, Minnesota. The school enrolls 1,825 students in grades 9-12 and has the capacity to enroll 2,000. Arlington opened on September 3, 1996 as the newest high school for the Saint Paul Public School district. The school was the first high school to be built since Humboldt Senior High School in 1976. Arlington is the only high school in Saint Paul with no attendance boundaries and enrolls students from throughout the city. Often the school is used to reassign students who could not be enrolled into other high schools.
Arlington uses a teaching program called "Small Learning Communities" that separates particular student interests into different areas of the school. Freshmen and sophomores are separated into "houses" of smaller learning groups. Upper classmen follow specified career paths. Arlington offers language classes in French, Spanish and Arabic. The school also participates in the University of Minnesota's College in the Schools program, and offers several Advanced Placement classes. Starting in the 2009-2009 school year, the school's main educational focus will be a program dubbed "Bio-SMART". The program will emphasize bioscience and the use of technology in health care.