 the U.S. Office of Management and Budget defines the Austin–Round Rock–Georgetown MSA as including Bastrop, Caldwell, Hays, Travis, and Williamson Counties.The U.S. Bureau of Economic Analysis includes the counties of Blanco, Burnet, Lee, Llano, Mason, and Milam Counties, in addition to the Austin MSA, in its definition of the Austin Economic Area.The Capital Area Council of Governments, an Austin-area intergovernmental cooperative, adds Blanco, Burnet, Fayette, Lee, and Llano Counties to the MSA counties in its definition of the metropolitan area.