Camp Nelson, CA has a population of 72 and is the 27,594th largest city in the United States. The population density is 58 per sq mi which is 75% lower than the California average and 36% lower than the national average. The median age in Camp Nelson is 60 which is approximately 68% higher than the California average of 36. In Camp Nelson, 100% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 79% of Camp Nelson residents were born in California, 21% were born out of state, 0% were born outside of the United States and 0% were foreign born.