The Pacific Steamship Company was a US freight and passenger shipping company that operated between 1916 and 1936. The company was formed by the merger of the Pacific Coast Steamship Company and the Pacific-Alaska Navigation Company and was a direct competitor to the Alaska Steamship Company in the Alaska-Seattle shipping business.[1] Pacific Steamship Co. owned and operated The Admiral Line and The Admiral Oriental Line. American Mail Line worked with the Admiral Oriental Line.[2]