- Napa is a city located in Napa County, California, in the United States. It is known for its stunning vineyards and is considered one of the premier wine regions in the world. The city is located in the Napa Valley and is surrounded by picturesque rolling hills. Napa is also home to a vibrant culinary scene, with numerous Michelin-starred restaurants and food and wine festivals. The downtown area features charming storefronts, art galleries, and a riverfront promenade. Outdoor activities such as hiking, biking, and hot air ballooning are also popular in Napa.