Truman petitioned for membership in the Belton Masonic Lodge in December 1908. He was accepted soon after and quickly passed through the different degrees of membership. "My Masonic career has been helpful in teaching me to get along with people," Truman wrote late in life, "has caused me to become more familiar with the Bible[,] and inspired me to read a great deal of history." (Undated handwritten manuscript.)
The Belton Masonic Lodge 450 sits at the northwest corner of Ella and Main Streets in Belton, Missouri.