The 2016 Brooks, Georgia, population is 547. There are 128 people per square mile (population density). The median age is 39.5. The US median is 37.4. 72.42% of people in Brooks, Georgia, are married. 8.07% are divorced. The average household size is 2.87 people. 40.78% of people are married, with children. 7.82% have children, but are single.