Bartlesville is a city in Osage and Washington counties in the U.S. state of Oklahoma. The population was 35,750 at the 2010 census. Bartlesville is 47 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. Bartlesville is the primary city of the Bartlesville Micropolitan area, which consists of Washington County and has a population of 50,976 (2010). Bartlesville Micropolitan area is also part of the Tulsa Combined Statistical Area CSA with a population of 988,454 (2010).
Bartlesville is notable as the longtime home of Phillips Petroleum Company. Previously merged with Conoco as ConocoPhillips, now split into the two independent companies Phillips 66 and ConocoPhillips, both companies remain in Bartlesville. Frank Phillips founded Phillips Petroleum in Bartlesville in 1905 when the area was still Indian Territory. Phillips has always been the city's 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.