When Cyrus P Needham was born in March 1862, in Kendall Township, Kendall, Illinois, United States, his father, Washington Needham, was 32 and his mother, Lorinda O. Helmer, was 37. He married Helene Arnold on 21 November 1911, in King, Washington, United States. He lived in Winnebago, Iowa, United States in 1895 and Port Orchard, Kitsap, Washington, United States in 1910. He died on 11 February 1938, in Seattle, King, Washington, United States, at the age of 75, and was buried in Aberdeen, Brown, South Dakota, United States.