Columbiana is a city located in Shelby County Alabama. It is also the county seat of Shelby County. With a 2020 population of 4,546, it is the 109th largest city in Alabama and the 5034th largest city in the United States . Columbiana is currently declining at a rate of -0.04% annually but its population has increased by 8.32% since the most recent census, which recorded a population of 4,197 in 2010. Columbiana reached it's highest population of 4,601 in 2017. Spanning over 17 miles, Columbiana has a population density of 263 people per square mile.
The average household income in Columbiana is $45,581 with a poverty rate of 18.58%. The median rental costs in recent years comes to $593 per month, and the median house value is $125,000. The median age in Columbiana is 39.9 years, 36 years for males, and 48.2 years for females.