Orrin Frederick Kauffman (March 14, 1876 - October 5, 1930) was an Atlanta, Georgia, based civil engineer. He was born in Baughman Township, Wayne, Ohio. He is alternately identified as 'Orsen' or 'Aaron'. Orrin moved to Atlanta around 1899 to work for the Title Guarantee and Trust Company. There, in 1901, he married Gertrude Evangeline Curtis, described as a 'woman of unusual beauty'. Around 1906, Orrin founded the civil engineering firm O.F. Kauffman and Brother with Ira Ulysses Kauffman (1881 - 1937). The firm is known for surveying many of Atlanta's suburbs, including Druid Hills, Ansley Park, and Avondale Estates (where he lived in a gracious southern mansion). Kauffman fell ill around 1929 and appears to have retired from O.F. Kauffman, as in that year, his brother and partner founded I. U. Kauffman and Son. Further disturbed by domestic troubles, his wife Gertrude (Curtis) Kauffman filed for divorce two weeks prior; Kauffman committed suicide by poison in his offices in the Chandler Building on October 5, 1930. The largest collection of Kauffman's regional surveys are held at Emory University.