Florissant, CO has a population of 43 and is the 28,330th largest city in the United States. The population density is 83 per sq mi which is 67% higher than the Colorado average and 8% lower than the national average. The median age in Florissant is 49 which is approximately 35% higher than the Colorado average of 36. In Florissant, 44% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 44% of Florissant residents were born in Colorado, 56% were born out of state, 0% were born outside of the United States and 0% were foreign born.