Robert F. Yonash (February 7, 1919 – April 19, 1997) was an American engineer in the early days of the aircraft industry. He was a member of the start-up management team for the Texas Engineering & Manufacturing Company (TEMCO), which eventually became the "T" in the conglomerate Ling-Temco-Vought (LTV). He was the co-founder, with Harold Silver, of the Intercontinental Manufacturing Company (IMCO), which is currently owned by General Dynamics. Following his career in the aircraft industry, Yonash was an entrepreneur in Sonoma County, California for nearly forty years.