Washington Park is a village in St. Clair County, Illinois, United States. The population was 2,592 as of the 2020 census, down from 4,196 in 2010. Washington Park filed for Chapter 9 bankruptcy protection in July 2009, citing assets of less than $50,000 and debt of more than $1 million. U.S. Bankruptcy Judge Pamela Pepper threw out the filing in December 2…Washington Park is a village in St. Clair County, Illinois, United States. The population was 2,592 as of the 2020 census, down from 4,196 in 2010. Washington Park filed for Chapter 9 bankruptcy protection in July 2009, citing assets of less than $50,000 and debt of more than $1 million. U.S. Bankruptcy Judge Pamela Pepper threw out the filing in December 2010 after finding there was no state law enabling a municipality to declare bankruptcy. Washington Park filed for bankruptcy in 2004 as well, claiming a $1.6 million debt, but that filing was dismissed when the village briefly emerged from insolvency.