Sleepy Hollow is a village in Kane County, Illinois, United States. The population was 3,304 at the 2010 census.
Sleepy Hollow is located in northeastern Kane County at 42°5′27″N 88°18′44″W (42.090792, -88.312314). It is bordered to the north and east by the village of West Dundee and to the south and west by the city of Elgin.
According to the 2010 census, Sleepy Hollow has a total area of 2.026 square miles (5.25 km2), of which 2 square miles (5.18 km2) (or 98.72%) is land and 0.026 square miles (0.07 km2) (or 1.28%) is water.
Sleepy Hollow is generally bounded by Randall Road to the west and Illinois Route 72 to the north. Illinois Route 31 runs east of the village limits, and Interstate 90 passes to the south.
As of the census of 2000, there were 3,553 people, 1,185 households, and 1,026 families residing in the village. The population density was 1,766.3 people per square mile (682.5/km2). There were 1,207 housing units at an average density of 600.1 per square mile (231.9/km2). The racial makeup of the village was 93.33% White, 0.65% African American, 0.06% Native American, 2.17% Asian, 0.03% Pacific Islander, 1.77% from other races, and 2.00% from two or more races. Hispanic or Latino of any race were 3.77% of the population.