Hofer Ranch, National Register of Historic Places ranch in Ontario, California, United States.

Hofer Ranch is a historic ranch headquarters compound in Ontario, California, in the Pomona Valley and within the Cucamonga Valley AVA. Its buildings include a barn, a bunkhouse, wood sheds, a cookhouse, and a two-room home expanded from an abandoned schoolhouse. The family has farmed it continuously since 1882, and winegrapes remain the main crop.

The Hofer family bought the first land in 1882 and expanded the ranch to 960 acres, growing grapes, apricots and peaches as the main crops. Winegrapes became the dominant crop from the late 1890s onward. The ranch was listed as a historic district on the National Register of Historic Places on July 8, 1993, and the family has farmed it continuously since 1882.

The ranch bears the name of the Hofer family, who have lived and worked it continuously since 1882. Winegrapes became the dominant crop in the late 1890s and are still grown there today, within the Cucamonga Valley AVA. A cookhouse was built to feed the men who lived and worked on the ranch.

The ranch is privately owned and not open to visitors, but the historic buildings can be seen from the public roads that run near the property. Early morning or late afternoon light makes the wooden structures easier to see clearly.

The vacant one-room Santa Fe land office was bought and hauled to the headquarters by a team of horses; several family members lived in it until the two-room home was enlarged as the family grew.