Northwest Arkansas (NWA) is a metropolitan area and region in Arkansas within the Ozark Mountains. It includes four of the ten largest cities in the state: Fayetteville, Springdale, Rogers, and Bentonville, the surrounding towns of Benton and Washington counties, and adjacent rural Madison County, Arkansas. The United States Census Bureau-defined Fayetteville–Springdale–Rogers Metropolitan Statistical Area includes 3,213.01 square miles (8,321.7 km2) and 560,709 residents (as of 2021), ranking NWA as the 102nd most-populous metropolitan statistical area in the U.S. and the 13th fastest growing in the United States. Northwest Arkansas doubled in population between 1990 and 2010. Growth has been driven by the three Fortune 500 companies based in NWA: Walmart, Tyson Foods, and J.B. Hunt Transport Services, Inc. as well as over 1,300 suppliers and vendors drawn to the region by these large businesses and NWA's business climate. There are also several large private employers like Simmons Foods in Siloam Springs. The region has also seen significant investment in amenities, including the Crystal Bridges Museum of American Art, the Walmart AMP, and the NWA Razorback Regional Greenway. From Wikipedia