Cedar Rapids, IA has a population of 129,537 and is the 207th largest city in the United States. The population density is 1,830 per sq mi which is 3250% higher than the Iowa average and 1920% higher than the national average. The median age in Cedar Rapids is 36 which is approximately 6% lower than the Iowa average of 38. In Cedar Rapids, 54% of the population over 15 years of age are married, 94% speak English and 2% speak Spanish. 71% of Cedar Rapids residents were born in Iowa, 24% were born out of state, 1% were born outside of the United States and 4% were foreign born.