Ortonville is an unincorporated community of Ventura County, California, United States.

Ortonville is located along California State Route 33 4.8 miles (7.7 km) northwest of Ventura.

Ortonville lies north of the unincorporated community Wadstrom and south of the unincorporated community Weldons.

All three were served by the 20th century Ventura and Ojai Valley Railroad.

This Ventura County, California–related article is a stub.