(Decanter) - Sonoma Valley has announced the launch of a new campaign to differentiate the region from the larger Sonoma Coast and even larger Sonoma County AVA. 'Is it a town? A county?': confusion over Sonoma AVAs There is confusion in the marketplace regarding the differences between the many appellations that include the name ‘Sonoma’, the Sonoma Valley Vintners and Growers Alliance reckons. ‘We know that Sonoma Valley has very distinct appellations, but there is confusion with the title. Is it a coast? Is it a valley? Is it a town? A county? Or all?’ executive director Maureen Cottingham said.