It could be said that it is the gateway to the area of Oklahoma known as "Green Country" for its lush rolling hills. Tulsa County's western tip reaches Lake Keystone, while the Arkansas River, in its wide bed, rolls southeastward across the county. Cattle and horse ranches and rich farmland lie almost within the shadow of urban buildings.
The county has the state's second largest city, Tulsa, whose energy, aviation, finance, computer and electronics bases are supported by a broad complex of institutes of higher learning. Surrounding this core, is a rapidly growing ring of suburban cities, including Broken Arrow, Bixby, Jenks, Owasso and Sand Springs. A secondary ring of thriving rural communities include the towns of Collinsville, Glenpool, Liberty, Mannford, Skiatook, and Sperry. Beyond these areas, close at hand, there are still quiet, backwood areas.
History runs deep in Tulsa County, from the early Native American inhabitants to the cattlemen, the coming of the railroads, and the oil boom. Near downtown Tulsa lies the historic meeting place of the Creek, Cherokee and Osage nations, Council Oak Tree.