Glen Allen is a city located in Alabama. With a 2020 population of 485, it is the 340th largest city in Alabama and the 13453rd largest city in the United States. Glen Allen is currently declining at a rate of -0.21% annually and its population has decreased by -4.90% since the most recent census, which recorded a population of 510 in 2010. Glen Allen reached it's highest population of 506 in 2010. Spanning over 7 miles, Glen Allen has a population density of 74 people per square mile.
The average household income in Glen Allen is $51,245 with a poverty rate of 22.99%. The median rental costs in recent years comes to $813 per month, and the median house value is $70,500. The median age in Glen Allen is 46.1 years, 36.7 years for males, and 50.7 years for females. For every 100 females there are 93.3 males.