Mad River, CA has a population of 425 and is the 20,531st largest city in the United States. The population density is 12 per sq mi which is 95% lower than the California average and 86% lower than the national average. The median age in Mad River is 38 which is approximately 5% higher than the California average of 36. In Mad River, 48% of the population over 15 years of age are married, 90% speak English and 5% speak Spanish. 58% of Mad River residents were born in California, 38% were born out of state, 0% were born outside of the United States and 4% were foreign born.
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The population density in Mad River is 95% lower than California.
The median age in Mad River is 5% higher than California.
In Mad River 78.59% of the population is White.
In Mad River 0.00% of the population is Black or African American.