Wilfred (or William) Langdon Kihn (September 5, 1898 – December 12, 1957) was a portrait painter and illustrator specializing in portraits of American Indians.
Motivated by a desire to document the disappearing aboriginal culture, he spent many years visiting and living with Indian tribes in the Western United States. In 1920, he was admitted to the Blackfeet tribe in Montana, under the name "Zoi-och-ka-tsai-ya," meaning "Chase Enemy in Water".
His work is in the permanent collections of, among others, the McCord Museum in Montreal, Quebec, and the Davison Art Center Gallery at Wesleyan University, Middletown, Connecticut.[