Karl L. King (February 21, 1891 – February 19, 1971) was a United States march music bandmaster and composer. He is best known as the composer of "Barnum and Bailey's Favorite". The most expensive painting in Iowa, the "Karl L. King Portrait" resides in St. Edmond Catholic School's most esteemed room; the band room. It has been rumored that his eyes follow students around the room throughout the day, and that his spirit still haunts the band room and students to this day.