Robert Galbreath Jr. was born to Robert and Sarah A. Galbreath on a farm in Pickaway County, Ohio on December 23, 1863. He evidently lived there until he decided to go to Kansas in 1884, where he met with David L. Payne. Payne would later achieve notability as leader of the Boomers in Indian Territory. However, Galbreath did not join the movement, but traveled on to California in 1889. It would seem that he did not find what he was seeking, because he returned to Indian Territory in 1889. Robert was joined by his younger brother, Herman. They entered the 1889 Land Rush for the Unassigned Lands. The pair claimed land near the present town of Hennessey. They soon sold the claim and moved to Edmond.
Settling in Indian Territory
Robert held a variety of jobs after arriving in Edmond, including serving as postmaster and starting a newspaper. In 1892, he married Mary Ellen Kivlehen. Robert participated in the 1893 Cherokee Outlet. Following that experience, he moved his family to Perry, where he published the Perry Evening Democrat. In 1895, he was appointed as a United States Commissioner headquartered in Shawnee.. In 1899, Galbreath moved to Oklahoma City to open a real estate business. There, he formed a business partnership with Charles Colcord.
Wildcatting
Galbreath's career in the oil business began when he and Colcord became partners with Charles "Gristmill" Jones to drill a wildcat well in the newly discovered Red Fork field near Tulsa. The well became a successful producer, providing Galbreath with enough money to continue wildcatting. He then partnered with Frank Chesley and bought a lease on a farm that belonged to Ida E. Glenn and her husband Robert. Ida was a mixed-blood Creek Indian, while Robert was white. She had received the land by allotment. Galbreath reportedly paid about three cents per acre for the lease. Galbreath named the well "Ida Glenn No. 1." The two men operated the drilling rig themselves. On November 22, 1905, it produced a gusher and initiated a major oil boom in the area. The gusher was the first strike in a very large field that Galbreath named Glenn Pool. It became the state's largest oil field. Galbreath moved to Tulsa to continue his activities in the oil fields. Galbreath continued to drill two more producing wells in the Glenn Pool field. Together, these three wells earned him the names "Oil King of the Southwest" and "the richest man in Oklahoma." In 1907, he drilled the first producing well in the Bald Hill Field in Okmulgee County. In 1909 he sold his Glenn Pool holdings to J. E. Crosbie and turned his attention to politics. He defeated W. Tate Brady in the 1912 election for National Committeeman of the Democratic Party.
Other business interests
His other business interests included building the three-story Galbreath Hotel in the town of Bromide, where he intended to develop a health spa based on the local mineral water. The Great Depression caused the idea to fail. He also attempted to mine iron and manganese in southeastern Oklahoma.
Family
Robert and Mary Ellen had four children: Robert, Leona, George Francis and Glenn Pool.