Charles E. Mills (March 30, 1867 – January 17, 1929) was an American businessman and banker. Born in Illinois and raised in Iowa, Mills went to the Arizona Territory and applied his engineering education in the mining industry. Except for a return east for two years while studying at Harvard University, and time in the military during the Spanish–American War and World War I, he remained in Arizona where he managed several mining operations. He also entered the banking industry in the territory, and ended his career as president of two prominent Arizona corporations, the Apache Powder Company and the Valley Bank of Arizona.