Blue Lake, CA has a population of 1,147 and is the 14,311th largest city in the United States. The population density is 1,935 per sq mi which is 733% higher than the California average and 2035% higher than the national average. The median age in Blue Lake is 38 which is approximately 5% higher than the California average of 36. In Blue Lake, 45% of the population over 15 years of age are married, 97% speak English and 3% speak Spanish. 59% of Blue Lake residents were born in California, 37% were born out of state, 3% were born outside of the United States and 1% were foreign born.