Grand Lake, CO has a population of 205 and is the 24,350th largest city in the United States. The population density is 195 per sq mi which is 292% higher than the Colorado average and 116% higher than the national average. The median age in Grand Lake is 59 which is approximately 62% higher than the Colorado average of 36. In Grand Lake, 60% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 32% of Grand Lake residents were born in Colorado, 54% were born out of state, 1% were born outside of the United States and 13% were foreign born.