Arlington Heights is a city located in Cook County Illinois. With a 2020 population of 74,048, it is the 13th largest city in Illinois and the 493rd largest city in the United States . Arlington Heights is currently declining at a rate of -0.48% annually and its population has decreased by -1.40% since the most recent census, which recorded a population of 75,101 in 2010. Arlington Heights reached it's highest population of 76,145 in 2014. Spanning over 17 miles, Arlington Heights has a population density of 4,459 people per square mile.
The average household income in Arlington Heights is $123,877 with a poverty rate of 3.97%. The median rental costs in recent years comes to $1,368 per month, and the median house value is $358,300. The median age in Arlington Heights is 44.5 years, 42.5 years for males, and 46.7 years for females.