Grandwood Park is a census-designated place (CDP) in Warren Township, Lake County, Illinois, United States. Per the 2020 census, the population was 5,297. Geography The community is in north-central Lake County, in the northwestern part of Warren Township. It is bordered to the north by the village of Old Mill Creek, to the west by Lindenhurst, and to the south and east by Gurnee. U.S. Route 45 runs along the west side of the CDP, leading south to Mundelein and north to Bristol, Wisconsin. Illinois Route 132 forms the southern boundary of the CDP; it leads east to Gurnee and northwest to Lindenhurst. Exit 8 on Interstate 94 is east of Grandwood Park on Route 132, north of downtown Chicago. According to the U.S. Census Bureau, the Grandwood Park CDP has a total area of , of which , or 1.22%, are water. Grandwood Lake is a small impoundment on Mill Creek in the center of the community. Demographics 2020 census Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race. 2000 Census As of the census of 2000, there were 4,521 people, 1,572 households, and 1,229 families residing in the CDP. The population density was . There were 1,602 housing units at an average density of . The racial makeup of the CDP was 86.86% White, 4.14% African American, 0.11% Native American, 4.49% Asian, 2.10% from other races, and 2.30% from two or more races. Hispanic or Latino of any race were 5.57% of the population. There were 1,572 households, out of which 46.1% had children under the age of 18 living with them, 67.0% were married couples living together, 8.5% had a female householder with no husband present, and 21.8% were non-families. 17.8% of all households were made up of individuals, and 2.2% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.31. In the CDP, the population was spread out, with 32.3% under the age of 18, 5.8% from 18 to 24, 36.8% from 25 to 44, 20.1% from 45 to 64, and 5.0% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 97.1 males. For every 100 females age