In Dissolving Cities, Professor Michelle Wilde Anderson suggests that municipal dissolution could enable counties to serve regionalist goals. This Essay argues that, on balance, municipal dissolution will not trigger the emergence of counties as agents of regional reform. Modern metropolitan regions span city, county, and state borders. As the scale of the region expands, state and local governments, including counties, will increasingly lack the territorial jurisdiction and regulatory capacity to respond to complex metropolitan problems. The Essay concludes by considering the role that the federal government can play, and has historically played, in facilitating regional collaboration at the appropriate scale.