Lakeside, CO has a population of 10 and is the 28,954th largest city in the United States. The population density is 53 per sq mi which is 7% higher than the Colorado average and 41% lower than the national average. The median age in Lakeside is 42 which is approximately 15% higher than the Colorado average of 36. In Lakeside, 0% of the population over 15 years of age are married, 80% speak English and 20% speak Spanish. 50% of Lakeside residents were born in Colorado, 30% were born out of state, 0% were born outside of the United States and 20% were foreign born.