Prior to European contact, the indigenous Patwin tribe lived in the area with the Ululato tribelet establishing a chiefdom around the Ululato village in what is now downtown Vacaville along the Ulatis Creek.
The early s… See more

Vacaville is surrounded by the Vaca Mountains to the south and to the west and the Sacramento Valley to the north and to the east.
A number of rare and endangered species occur in th… See more

According to the 2020 United States Census, Vacaville had a population of 102,386. During the period 2015–2019, on average, 2.81 people lived in a household. The American Community Survey estimated t… See more