The 2014 Council Bluffs, Iowa, population is 61,986. There are 1,513 people per square mile (population density). The median age is 36.1. The US median is 37.2. 48.03% of people in Council Bluffs, Iowa, are married. 14.50% are divorced. The average household size is 2.44 people. 27.51% of people are married, with children. 20.53% have children, but are single.