| Official Name: | Lake Carroll, Illinois |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Lake Carroll |
| Coordinates: | 42.17°N -89.8689°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Carroll |
| Subdivision Type3: | Townships |
| Subdivision Name3: | Freedom Cherry Grove–Shannon |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 14.18 |
| Area Land Sq Mi: | 13.55 |
| Area Water Sq Mi: | 0.64 |
| Area Total Km2: | 36.74 |
| Area Land Km2: | 35.08 |
| Area Water Km2: | 1.65 |
| Population As Of: | 2020 |
| Population Density Km2: | 24.28 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 240 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 61046 (Lanark) |
| Area Code: | 815, 779 |
| Blank Name: | FIPS code |
| Blank Info: | 17-40980 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806514 |
| Population Total: | 852 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 62.90 |
Lake Carroll is a census-designated place (CDP) in Carroll County, Illinois, United States, surrounding a lake of the same name. It is in northeastern Carroll County and is bordered to the north by Stephenson County. It is 10miles northeast of Mount Carroll, the county seat, and southwest of Freeport.
Lake Carroll was first listed as a CDP prior to the 2020 census. As of the 2020 census, the population was 852.
Lake Carroll is located at . According to the 2021 census gazetteer files, Lake Carroll has a total area of 14.18sqmi, of which 13.55sqmi (or 95.50%) is land and 0.64sqmi (or 4.50%) is water.[2]
As of the 2020 census[3] there were 852 people, 216 households, and 156 families residing in the CDP. The population density was 60.07PD/sqmi. There were 1,064 housing units at an average density of 75.01/sqmi. The racial makeup of the CDP was 96.71% White, 0.23% African American, 0.23% Native American, 0.35% Asian, 0.12% Pacific Islander, 0.59% from other races, and 1.76% from two or more races. Hispanic or Latino of any race were 1.06% of the population.
There were 216 households, out of which 47.22% had children under the age of 18 living with them, 68.06% were married couples living together, 0.00% had a female householder with no husband present, and 27.78% were non-families. 24.07% of all households were made up of individuals, and 16.20% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 2.31.
The CDP's age distribution consisted of 20.4% under the age of 18, 0.0% from 18 to 24, 3.2% from 25 to 44, 21.4% from 45 to 64, and 55.0% who were 65 years of age or older. The median age was 66.4 years. For every 100 females, there were 83.8 males. For every 100 females age 18 and over, there were 99.0 males.
The median income for a household in the CDP was $84,048, and the median income for a family was $85,938. Males had a median income of $76,250 versus $40,962 for females. The per capita income for the CDP was $38,274. About 0.0% of families and 4.4% of the population were below the poverty line, including 0.0% of those under age 18 and 0.0% of those age 65 or over.