Ernest W. Barrett Parkway (more commonly Barrett Parkway) is a major thoroughfare in northwest metro Atlanta between western and northern Cobb County, Georgia. It runs from southwest of Marietta, to the north and then northeast near Kennesaw, and continues on in both directions under other names. The portion of Barrett Parkway between I-575 and Cobb Parkway (U.S. 41) is designated State Route 5 Connector. The road is named after Ernest W. Barrett, the first chairman of the Cobb County Board of Commissioners in the 1960s, after home rule was enacted under a Georgia State Constitution amendment.