Orland Hills (formerly Westhaven) is a village in Cook County, Illinois, United States. The population was 7,149 at the 2010 census.
Orland Hills is located at 41°35′19″N 87°50′27″W (41.588732, -87.840837)., in between Orland Park and Tinley Park. Orland Hills has two (2) lakes: Lake Ashbourne and Lake Lorin. It is also home to Kelly Park. According to the 2010 census, Orland Hills has a total area of 1.148 square miles (2.97 km2), of which 1.14 square miles (2.95 km2) (or 99.3%) is land and 0.008 square miles (0.02 km2) (or 0.7%) is water.
As of the 2000 census, there were 6,779 people, 2,153 households, and 1,767 families living in the village. As of 2012, there is 7,206 residents. The population density was 6,217.2 people per square mile (2,401.3/km2). There were 2,182 housing units at an average density of 2,001.2 per square mile (772.9/km2). The racial makeup of the village was 86.71% White, 5.10% African American, 0.25% Native American, 3.32% Asian, 1.73% from other races, and 2.89% from two or more races. Hispanic or Latino of any race were 6.03% of the population, including 5.0% of Mexican descent.