Mr. Leffler married at Eaton; Indiana, June 23, 1888, Miss Nettie A. Sloniker, who was reared and educated in Delaware County. She is a member of the Friends Memorial Church at Muncie, the Eastern Star and the Federation of Women's Clubs. Her parents were David W. and Elizabeth (Green) Sloniker. Her father died in 1917 and her mother in 1918, and they are buried at Beech Grove, Muncie. Mr. and Mrs. Leffler had one child, Josephine Lucille, who graduated from the Muncie High School in 1915, also took work in the Muncie Normal, now the Ball State Teachers College, and was a kindergarten teacher until her marriage to Mr. O. D. Smith.