Napa is the county seat of Napa County, California. It is the principal city of the Napa county Metropolitan Statistical Area, which encompasses Napa county. As of the 2000 census, the city had a total population of 72,585. The area was settled in the 1830s. It was incorporated as a city in 1872. Napa apartments for rent comparison page shows most up to date rent information on Napa apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.