Nancy Jane Kulp ( August 28 , 1921 -- February 3 , 1991 ) was an American character actress best known as Miss Jane Hathaway on the popular CBS television series `` The Beverly Hillbillies '' .
Nancy Kulp ( August 28 , 1921 -- February 3 , 1991 ) was an American actress . She played Miss Jane Hathaway on `` The Beverly Hillbillies '' .