Peña Adobe (Vaca-Peña Adobe) is a historic building and park in Vacaville, Solano County, California, United States.

[3] It was built in 1842 by the Californios and designed by Juan Felipe Peña on the Rancho Los Putos.

It is situated on 1.5 acres (0.61 ha).

[4] The Peña Adobe is part of the city's Peña Adobe Park, which includes the Mowers-Goheen Museum, the Willis Linn Jepson Memorial Garden, Indian Council Ground and picnic and recreation facilities.

The Peña Adobe Historical Society provides educational and cultural services.