Quick information summary of the Johnsville CDP area.
Johnsville CDP is located in the state of California. It occupies the area of 15 square miles. 1 square miles are water areas and 14 square miles remain for land areas. Center of the Johnsville CDP lies at +39.7697097, -120.6997827 coordinates. According to the 2010 Census, there are 20 living in the Johnsville CDP. The racial makeup shows these 3 races as the most frequent : White (100%), Two or More races (0%) and (%). Median age is 60 for the males and 55 for the females.