Sonora is a city in Tuolumne County, California, serving as the county seat in the Sierra Nevada foothills of the state's Gold Country. Founded during the California Gold Rush, Sonora was among the largest and most important of the gold rush towns, with reports of nearly 15,000 miners in the area by 1849. Today it is a small city of roughly 4,800 residents, but its downtown remains one of the best-preserved examples of Gold Rush-era architecture in the region, with Washington Street passing historic brick storefronts, the Sonora Opera Hall, and the nineteenth-century Tuolumne County Courthouse. Sonora's economy has shifted from mining to a mix of county government, healthcare, tourism, and retirement. As the county seat, it hosts Tuolumne County's administrative offices and courts, anchoring employment for the wider region. Tourism plays a central role: Sonora sits on the main approach to Yosemite National Park, about an hour to the east, and it is surrounded by Gold Country attractions including Columbia State Historic Park and the Railtown 1897 State Historic Park in nearby Jamestown, with its collection of steam and diesel locomotives. The city is set among the oak-studded foothills of the Sierra Nevada, with warm summers and mild winters, and it functions as the commercial and cultural center for Tuolumne County's smaller mountain communities. Historic residences — bungalows, cottages, and occasional Victorian homes — line the neighborhoods radiating from downtown, while the surrounding hills hold larger, more rural parcels. Sonora appeals to people drawn to Gold Rush history, small-town living, and outdoor access. It offers the conveniences of a county seat within minutes of Sierra trails, lakes, and one of the country's most famous national parks, making it a base for retirees, remote workers, and families seeking a slower foothill pace.