Otto William Timm (October 28, 1893 – June 29, 1978) was an American barnstormer and aircraft manufacturer of German descent based in California.

[2] Timm originally started in the aviation field in 1910 when he attempted to build a copy of the Santos-Dumont "Demoiselle" monoplane while living in Milwaukee, Wisconsin, although it appears this was never completed.

[1] In 1913, Timm sold the business to his partner and returned to Cicero Field to begin construction of a "conventional" biplane design under contract.

[3] Timm then built another design under contract for the Grinnell Aeroplane Company in 1915, later flying it at town fairs around the mideastern region during the summer of 1916.

In February 1922, Lindbergh had enrolled as a student at the Nebraska Aircraft Corporation's flying school and flew for the first time on April 9, 1922, when he took to the air as a passenger in a two-seat Lincoln Standard "Tourabout" biplane piloted by Timm.

In California he also produced a large (for the era) passenger biplane, the Timm Coach with an enclosed cabin seating seven and an open cockpit for two pilots.