 The landscape of the county is typical of the Great Plains with flat topography and gently rolling hills, while the areas in the north are marked by the Wichita Mountains.Interstate 44 and three major US Highways serve the county by ground, while the Lawton-Fort Sill Regional Airport serves the county by air.Comanche County's economy is largely based in the government sector which consist of half of the county's Gross Domestic Product.