Vallejo, California is in the North Bay Region.
Vallejo -LRB- -LSB- vəˈleɪ.oʊ , _ - hoʊ -RSB- ; Spanish : -LSB- baˈʎexo -RSB- -RRB- is a waterfront port city in Solano County , California , located in the North Bay region of the San Francisco Bay Area.
