Allen is a city located in Lyon County Kansas. With a 2020 population of 170, it is the 436th largest city in Kansas and the 17128th largest city in the United States . Allen is currently declining at a rate of -0.58% annually and its population has decreased by -3.95% since the most recent census, which recorded a population of 177 in 2010. Allen reached it's highest population of 177 in 2010. Spanning over 0 miles, Allen has a population density of 615 people per square mile.
The average household income in Allen is $47,659 with a poverty rate of 13.10%. The median rental costs in recent years comes to $492 per month, and the median house value is $60,800. The median age in Allen is 31.5 years, 29.9 years for males, and 34.3 years for females.