Crest Hill is a city in Lockport Township, Will County, Illinois, United States. The 2020 census put Crest Hill's population at 20,459. 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.