The pastors at Saint Frances of Rome School in Cicero and Saint Odilo School in Berwyn will both shut down at the end of the school year.
More than half of the students at those schools relied on the "Invest in Kids" scholarship program. The program provided tuition for low-income students.
People who donated to the program got tax breaks, but the Illinois General Assembly allowed the tax break to expire at the end of 2023.
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St. Leonard School in Berwyn and Our Lady of Charity School in Cicero will continue to operate, the Archdiocese said.
"Catholic schools are doing well academically and interest among families is strong," Superintendent of Catholic schools Greg Richmond said in a statement. "We believe the best way to keep Catholic education alive and thriving in Cicero and Berwyn is to consolidate our efforts on supporting one excellent school in each community. In this situation, trying to sustain four schools would have jeopardized all of them in the future. We are doing all that we can to keep our schools open, but the loss of the scholarship program will hurt. These may not be the last closures in our archdiocese."
Archdiocese officials hope the tax breaks are restored.