Nancy Fish Barnum Callias D'Orengiani, Baroness (née Fish; 22 April 1850 – 23 June 1927) was an English socialite, daughter of a successful cotton miller and the second wife of P. T. Barnum, 40 years her senior. After the death of Barnum's first wife in 1873, they married the following year in both London and New York City. After his death in 1891, he left her a large annuity.