Allen is a city located in Maryland. Allen has a 2020 population of 384. Allen is currently declining at a rate of 0.00% annually and its population has increased by 82.86% since the most recent census, which recorded a population of 210 in 2010. Allen reached it's highest population of 384 in 2018.
The average household income in Allen is $74,614 with a poverty rate of 0.00%. The median rental costs in recent years comes to - per month, and the median house value is $182,100. The median age in Allen is 61.1 years, 62.3 years for males, and 56.8 years for females. For every 100 females there are 81.1 males.