Patrick James Smyth (Irish name O'Gowan or Mac Gabhainn; 1823/1826 – 12 January 1885), also known as Nicaragua Smyth, was an Irish politician and journalist. A Young Irelander in 1848, and subsequently a journalist in American exile, from 1871 he was an Irish Home Rule Member of the United Kingdom Parliament for Westmeath and from 1880 for Tipperary.