The Texas Panhandle is a region of the U.S. state of Texas consisting of the northernmost 26 counties in the state. The panhandle is a square-shaped area bordered by New Mexico to the west and Oklahoma to the north and east. It is adjacent to the Oklahoma Panhandle. The Handbook of Texas defines the southern border of Swisher County as the southern boundary of the Texas Panhandle region. Its land area is , or nearly 10% of the state's total. The Texas Panhandle is slightly larger in size than the US state of West Virginia. An additional is covered by water. Its population as of the 2010 census was 427,927 residents, or 1.7% of the state's total population. As of the 2010 census, the population density for the region was . However, more than 72% of the Panhandle's residents live in the Amarillo Metropolitan Area, which is the largest and fastest-growing urban area in the region. The Panhandle is distinct from North Texas, which is further south and east. West of the Caprock Escarpment and North and South of the Canadian River breaks, the surface of the Llano Estacado is rather flat. South of the city of Amarillo, the level terrain gives way to Palo Duro Canyon, the second-largest canyon in the United States. This colorful canyon was carved by the Prairie Dog Town Fork Red River, a tributary of the Red River. North of Amarillo lies Lake Meredith, a reservoir created by Sanford Dam constructed on the main stem of the Canadian River. Lake Meredith and the Ogallala Aquifer are the primary sources of freshwater in this semi-arid region of the High Plains. Interstate Highway 40 passes through the Panhandle, and also passes through Amarillo. The freeway passes through Deaf Smith, Oldham, Potter, Carson, Gray, Donley, and Wheeler Counties. Demographics As of the census of 2020, about 434,358 people lived in the Panhandle. Of these, 53.6% were non-Hispanic White, 35.2% were Hispanic, 4.8% were African American, 2.8% were Asian. Only 4.1% were of some other ethnicity. About 92.3% of inhabitants claimed native birth, and 8.9% were veterans of the United States armed forces; 49.9% of the population was male, and 50.1% was female. Around 13.2% of the population was 65 years of age or older, whereas 27.8% of the population was under 18 years of age. Counties Twenty-six counties of the Panhandle (west to east, from the northwest corner):