Garden City, CO has a population of 240 and is the 23,632nd largest city in the United States. The population density is 2,126 per sq mi which is 4169% higher than the Colorado average and 2246% higher than the national average. The median age in Garden City is 40 which is approximately 9% higher than the Colorado average of 36. In Garden City, 43% of the population over 15 years of age are married, 56% speak English and 44% speak Spanish. 50% of Garden City residents were born in Colorado, 29% were born out of state, 0% were born outside of the United States and 21% were foreign born.