How tall is Rebecca De Mornay from Santa Rosa, California, U.S.? We trawled the web to determine that Rebecca De Mornay's height is 5ft 5 (165.1 cm). This makes her 1.0 inches taller than the average female in the United States. Are you looking for more information about Rebecca De Mornay and her career? We found resources at imdb.com, tcm.com & rottentomatoes.com.