Daniel O'Day
Daniel O'Day Jr. (March 11, 1870 – May 31, 1916) was one of northwestern Pennsylvania's earliest independent refiners who joined John D. Rockefeller's Standard Oil Company. He was born in Titusville, Pennsylvania, the son of Daniel O'Day Sr., a longtime Standard Oil director and close ally of Rockefeller who helped run the company's transportation network. When his father retired in 1905, Daniel O'Day Jr. took on many of his duties.
He led the installation of large pipelines that carried crude oil from fields to refiners along the Eastern Seaboard, making it easier to refine oil and ship it to Europe. He also directed crews who laid pipe from wells to railroads, helping move oil efficiently. Despite sabotage attempts by critics of Standard Oil, his teams worked quickly and kept the pipelines in operation, helping end the era of shipping oil mainly in wooden barrels.
In 1901 he married Caroline Love Goodwin in New York; they remained married until his death. He died on May 31, 1916, at his home in Rye, New York. He left an estate of more than $500,000, with his widow receiving a life interest and their three children — Ella W. O'Day, Daniel O'Day III, and Charles O'Day — inheriting after her death.
This page was last edited on 3 February 2026, at 04:46 (CET).