Crest Hill is a city in Will County, Illinois, United States. The population was 20,459 at the 2020 census. The neighborhood of Stern Park Gardens, later incorporated with Crest Hill, renamed itself Lidice in 1942 following the Lidice massacre. Former presidential candidate Wendell Willkie and Czechoslovak president-in-exile Edvard Beneš spoke at the dedication commemorating the tragedy.