Lincolnshire is a village in Lake County, Illinois, United States. The village is a northern suburb of Chicago. Per the 2020 census, the population was 7,940. Named after Lincolnshire, England, the village was incorporated on August 5, 1957, from the unincorporated Half Day area when land was purchased to build a residential subdivision. The community underwent an aggressive era of expansion from 1983 to the 1990s.