Census estimates predict nearly all Illinois municipalities shed population last year, with a greater share of large communities being affected.

Illinois was the nation’s fifth-largest state until 2020 census data was released. Now Pennsylvania’s population exceeds Illinois’ to take the No. 5 spot.

Illinois will lose one representative in the U.S. House. The state’s population declined for the first time in over 200 years, the 10-year U.S. Census count showed.

Illinois’ decade of population loss, with last year being the worst loss of people since World War II, will cost is one seat in the U.S. House of Representatives. Some thought the new Census would cost Illinois two seats in Congress.