Bristow, IA has a population of 153 and is the 25,584th largest city in the United States. The population density is 164 per sq mi which is 199% higher than the Iowa average and 81% higher than the national average. The median age in Bristow is 38 which is approximately 1% lower than the Iowa average of 38. In Bristow, 64% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 90% of Bristow residents were born in Iowa, 10% were born out of state, 0% were born outside of the United States and 1% were foreign born.