Healdsburg is a city located in Sonoma County, California, in the United States. As of the 2010 United States Census, the city had a population of 11,254. Healdsburg is a small tourist-oriented town in northern Sonoma County. Due to its three most important wine-producing regions, Healdsburg has been continuously awarded one of the top 10 small towns in America.Healdsburg is centered on a 19th-century plaza that provides an important focal point for tourists and locals.