Sleepy Hollow is a city located in Illinois. With a 2020 population of 3,176, it is the 408th largest city in Illinois and the 6073rd largest city in the United States . Sleepy Hollow is currently declining at a rate of -1.06% annually and its population has decreased by -3.87% since the most recent census, which recorded a population of 3,304 in 2010. Sleepy Hollow reached it's highest population of 3,553 in 2000. Spanning over 2 miles, Sleepy Hollow has a population density of 1,586 people per square mile.
The average household income in Sleepy Hollow is $136,088 with a poverty rate of 4.08%. The median rental costs in recent years comes to $1,125 per month, and the median house value is $305,500. The median age in Sleepy Hollow is 49.4 years, 47.2 years for males, and 51 years for females.