In addition to Decorah,[2] the census-designated place of Burr Oak is in the district boundary, and therefore the high school's attendance area.

[3] Other unincorporated areas in the district include Bluffton, Freeport, Hesper, Highlandville, Locust, and Nordness.

[6] Decorah is a founding member of the Northeast Iowa Conference, and participates in the following sports:[7] According to an online database compiled by the Des Moines Register, Decorah has won 46 state championships, which is believed to be sixth most statewide, most among schools classified as 3A or smaller, and more than twice the number of any other conference school.

[citation needed] Decorah has won the Northeast Iowa Conference All-Sports Championship ten times since its creation in the 1976–77 school year.

Changes will include a new gymnasium, completed in the spring of 2012, and a complete renovation of the entire building, including updating and replacing the heating, cooling, electrical and communication systems, repairing the roof, creating a "safe room" for security and safety during severe weather, and restructuring the cafeteria and gym areas.