Sir Fielding Ould (1710–29 November 1789) was an Irish doctor and medical writer.
He studied in Paris and settled in Golden Lane, Dublin as a medical practitioner in 1736.
He published an enormously influential treatise on midwifery in 1742, although it was criticized for a number of factual errors.
Ould was one of 49 physicians and chirurgeons who declared their public support for the construction of a Publick Bath in Dublin in May 1771 and named Achmet Borumborad as a well qualified individual for carrying such a scheme into existence.
Later descendants included the painter Sir Fielding Fielding-Ould, and the noted architect William Vitruvius Morrison.