Carl Sweezy (1881–1953) was a Southern Arapaho painter from Oklahoma. He painted individual portraits, but was best known for his portrayals of ceremonies and dances.
Carl Sweezy was born in 1881 near the Darlington Agency on the Cheyenne and Arapaho Indian Reservation in Indian Territory. His Arapaho name was Wattan, meaning "Black." Sweezy's father was Hinan Ba Seth, meaning "Big Man." His tribe still hunted buffalo when he was a child.
Sweezy's mother died early, so he lived full-time at the Mennonite Mission School at Darlington Agency. He later attended the Mennonite Boarding School of Halstead, Kansas, Carlisle Indian Boarding School in Pennsylvania, and Chilocco Indian Agricultural School, north of Ponca City, Oklahoma. For a season Sweezy was a professional baseball player, and later he worked as a tribal policeman. Although he never received formal art training, he loved drawing and painting from an early age. An agency employee encouraged whim with a gift of watercolor paints.
Around 1895, when Sweezy was 14 years old, ethnographer James Mooney commissioned Sweezy to paint images of traditional Arapaho life. Later, Sweezy also worked with anthropologist George Dorsey. Sweezy continued to be a prolific painter, expanding his media and materials into the mid-20th century. By the 1920s Sweezy was a full-time painter.
Sweezy worked in watercolors on paper and oil on canvas, as well as house paint on board. He was one of Cheyenne artist Dick West's first artistic mentors. Although he painted individual portraits, he is known for his portrayals of ceremonies and dances, sometimes with over a dozen individual figures, with implied action and narrative. Sweezy developed a technique, employed by later Southern Plains artists, of painting an active Native American Church meeting by rolling up the tipi flaps to reveal the participants inside.