Brush, CO has a population of 5,458 and is the 6,100th largest city in the United States. The population density is 2,134 per sq mi which is 4186% higher than the Colorado average and 2255% higher than the national average. The median age in Brush is 31 which is approximately 15% lower than the Colorado average of 36. In Brush, 58% of the population over 15 years of age are married, 78% speak English and 22% speak Spanish. 67% of Brush residents were born in Colorado, 22% were born out of state, 4% were born outside of the United States and 7% were foreign born.