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is a city in Washington county in the U.S. state of Oklahoma. The population was 34,748 at the 2000 census. Bartlesville is located forty-seven miles north of Tulsa and very close to Oklahoma's northern border with Kansas. It is the county seat of Washington County, in which most of the city lies; a part of the city's west side lies in Osage County.
Bartlesville is notable as the longtime home of Phillips Petroleum Company, now merged with Conoco as ConocoPhillips. Frank Phillips, who has a principal street named after him (the hospital is named after his wife Jane), founded Phillips Petroleum in Bartlesville in 1905 when the area was still Indian Territory. Phillips has always been the largest employer. Chiefly white-collar workers are employed by ConocoPhillips in Bartlesville, as the industrial extraction and refining work is done elsewhere in the state and throughout the world.
The city has one daily newspaper and several radio stations. It is one of two places in Oklahoma where a Lenape tribe lives, the other being Anadarko.
According to the United States Census Bureau, the city has a total area of 21.1 square miles (54.7 km²), of which, 21.1 square miles (54.7 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.09%) is water.
The Caney River flows through Bartlesville separating the downtown area from the east side. The river flooded in October 1986 due to above average rainfall. The city was split in half for several days and the flood caused considerable property damage. The river left its banks again in June 2007, cresting five feet below the 1986 crest.