Clio, CA has a population of 41 and is the 28,365th largest city in the United States. The population density is 70 per sq mi which is 70% lower than the California average and 23% lower than the national average. The median age in Clio is 63 which is approximately 74% higher than the California average of 36. In Clio, 49% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 76% of Clio residents were born in California, 24% were born out of state, 0% were born outside of the United States and 0% were foreign born.