Alpha is a city located in Henry County Illinois. With a 2020 population of 627, it is the 797th largest city in Illinois and the 12344th largest city in the United States . Alpha is currently declining at a rate of -0.63% annually and its population has decreased by -6.56% since the most recent census, which recorded a population of 671 in 2010. Alpha reached it's highest population of in . Spanning over 0 miles, Alpha has a population density of 2,030 people per square mile.
The average household income in Alpha is $73,357 with a poverty rate of 12.28%. The median rental costs in recent years comes to $732 per month, and the median house value is $86,400. The median age in Alpha is 37.5 years, 35.8 years for males, and 40.3 years for females.