William Bulfin (1 November 1863 – February 1910) was an Irish, and later Argentine, author, journalist, newspaper editor and publisher.
The Bulfins had with them letters of introduction to the Passionist Fathers in Buenos Aires, and went to the estancia (ranch) of one of these, Don Juan Dowling from Longford.
Observing his countrymen and the hard-riding Spanish-Indian cowboys he began to write homely sketches and stories about their lives for The Southern Cross, a weekly paper in Buenos Aires owned and edited by Michael Dineen from County Cork.
Years later, he wrote in The Southern Cross about the vanishing gaucho in a way that showed how closely he had observed and how he had been attracted by the vivid pattern of life on the Argentinian grasslands.
"He had his ranch and his horses and his work at trooping or marking or herding sheep, and he drank his anis or cana, and took his mate under his own fig tree, and gambled with bone or cards or on horse-racing at the pulperías of all the camps from the Arroyo Luna to the Medano Blanco, and along the frontier from Gainza to Melincué."
The sketches he wrote were published in The Southern Cross and also, due to his friendship with Arthur Griffith, in the United Irishman and Sinn Féin.
In 1902 he wrote Rambles In Eirinn, a well-regarded account of his travels around Ireland by bicycle on his return to his homeland.
He became ill during a visit to the United States fundraising with The O'Rahilly for Arthur Griffith's newspaper Sinn Fein.