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 touristic town in northern Sonoma County. Due to its three most important wine-producing regions (the Russian River, Dry Creek, and Alexander Valley AVAs), Healdsburg has been continuously awarded one of the top 10 smallest towns in America.