Napa County, and home of Empire Communications, is a county located north of the San Francisco Bay Area in the U.S. state of California. It is part of the Napa, California Metropolitan Statistical Area. As of 2000 the population is 124,279.

Empire Communications, one of the leading Toshiba Business Telephone System suppliers of California, provides Toshiba IP Phone Systems, telephone installation and repairs services for Napa.

The county seat is the City of Napa. Napa County was one of the original counties of California, created in 1850 at the time of statehood. Parts of the county's territory were given to Lake County in 1861. The word napa is of Native American derivation and has been variously translated as "house," "motherland" or "fish." Of the many explanations of the name's origin, the most plausible seems to be that it is derived from the Patwin word napo meaning house.  Napa County, once the producer of many different crops, is known today for its wine industry, rising in the 1960s to the first rank of wine regions with France and Italy. Napa is a leading wine making region in the United States.