1. The 15th Annual Miss USA Pageant

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. 21 May 1966

Miss USA 1966 was the 15th Miss USA pageant, televised live from Miami Beach, Florida, on May 21, 1966. Idaho and South Dakota did not send a delegate in 1966, making this the last Miss USA pageant in which not all states were represented The only subsequent pageant with fewer than 51 delegates in the live telecast – 1981 – resulted from a state representative being disqualified during the preliminary judging.