Born at Sedbury Park, West Gloucestershire, England, youngest daughter of antiquary George Ormerod.
Eleanor Anne Ormerod was born on 11 May 1828 at Sedbury Park, in West Gloucestershire, England. She was the youngest daughter among the ten children of the antiquary and historian George Ormerod and his wife Sarah (née Latham).
Growing up in a well-to-do, intellectually inclined gentry family, Eleanor received no formal schooling, as was typical for girls of her class and era, but she was encouraged to observe nature closely on the family estate. Her early fascination with insects, plants, and the natural world around Sedbury Park would prove to be the foundation for a remarkable, self-taught scientific career that few women of her generation could have imagined pursuing.
Her birth into a family with scholarly interests — her father was a noted genealogist and historian of Cheshire — provided her with access to books, an atmosphere that valued careful documentation and observation, and eventually the financial independence that allowed her to devote her adult life unpaid to entomological research. This upbringing, though not formally academic, cultivated the meticulous, evidence-based approach that would later define her contributions to economic entomology.