Security-Widefield, CO has a population of 34,956 and is the 1,206th largest city in the United States. The population density is 2,689 per sq mi which is 5300% higher than the Colorado average and 2868% higher than the national average. The median age in Security-Widefield is 33 which is approximately 9% lower than the Colorado average of 36. In Security-Widefield, 63% of the population over 15 years of age are married, 91% speak English and 4% speak Spanish. 35% of Security-Widefield residents were born in Colorado, 54% were born out of state, 5% were born outside of the United States and 6% were foreign born.