Abraham Darby IV (30 March 1804 – 28 November 1878) was an English ironmaster.
In 1830, he and his brother Alfred took over the management of the Horsehay foundry, one of several foundries owned by the family business, and set about re-establishing the Coalbrookdale Company's reputation by investing in new technology there for the manufacture of wrought iron.
He acted as a Justice of the Peace in both counties, and, in 1853, was appointed High Sheriff of Buckinghamshire.
He died at Treberfydd on 28 November 1878, aged 74,[3] and was buried at the church he had had built in Coalbrookdale.
After that, the patronage remained with the owners of the Sunniside estate until 1959, when it was transferred to the Bishop of Hereford.