When Justus Phillip Strowbridge was born on 14 August 1902, in Sandy, Clackamas, Oregon, United States, his father, John Alfred Strowbridge, was 30 and his mother, Sadie Elizabeth Wilcoxen, was 21. He married Gladys Irene Jameson on 11 August 1927, in Thurston, Washington, United States. He lived in Skagit, Washington, United States in 1935 and Sedro-Woolley Ward 2 Election Precinct 2, Skagit, Washington, United States in 1940. He died on 15 February 1963, in Multnomah, Oregon, United States, at the age of 60, and was buried in Sandy, Clackamas, Oregon, United States.