Where is the place Napa County located?

Napa County is located in the North Bay region of the San Francisco Bay Area in California. It is about 50 miles (80 km) north of San Francisco and 60 miles (97 km) west of Sacramento, the state capital. Napa County is bordered by Lake County to the north, Yolo County to the east, Solano County to the south, and Sonoma County to the west.