Illinois could lose at least one seat in the U.S. House of Representatives as the Census Bureau is set to release on Monday its state population counts and more data from the 2020 Census.
Delayed for several months in part by the COVID-19 pandemic, the Census Bureau is scheduled to release the first results of the 2020 Census, known as the “apportionment population counts” at a news conference at 2 p.m. Monday.
Those population counts determine each state’s representation in the U.S. House as well as its electoral votes, and inform state lawmakers as they redraw districts in the legislative maps.
Illinois’ number of seats in the House peaked at 27 from 1910 to 1930, according to the Census Bureau. Since then, the state’s population has either grown more slowly in comparison to other states, with just 18 congressional districts after the 2010 Census, or fallen in recent years.
The Center for Illinois Politics noted in March 2020 that 2013 was the last year Illinois saw an increase in population, reaching nearly 12.9 million.
The state’s population has fallen since then to around 12.65 million, the data shows, leaving Illinois poised to lose representation in the House proportionally with its population loss as demographic trends nationwide indicate more population growth in places like the Southwest.
The 435 seats in the U.S. House are divided among the states every 10 years after the Census, based on population.