Keith Warner (1895-1959) was an American art collector. Warner was born and lived in Gloversville, New York, and maintained a manufacturing business that took him to New York City intermittently. Warner began collecting Chinese porcelains after World War I, and a few years later his interest shifted to American abstract painting. Warner retired from business in 1944. His collection was sold gradually after his death, mostly to private collectors, though some works are in museums in the United States and Japan.