Although she put the decision on hold pending an appeal, an Illinois court declared that Donald Trump had participated in insurrection and disqualified him from the state's primary vote.
Mr. Trump has been eliminated from the primary ballots in Colorado and Maine due to his violation of the "insurrection" provision of the Fourteenth Amendment.
The US Supreme Court will probably make the final decision.
The primary election in Illinois is set on March 19.
In the primary, early voting has already started. In order to give himself time to file an appeal against the ruling, Mr. Trump, the front-runner Republican for president, will be on the ballot until at least Friday.
Cook County Circuit Judge Tracie Porter sided with voters who claimed that Mr. Trump's involvement in the Capitol violence on January 6th, 2017, violated the US Constitution's 14th Amendment.
It follows the Colorado Supreme Court's decision to disallow Mr. Trump from running for office in the Republican primary in December on the grounds that his participation in the 2021 Capitol riot constituted to insurrection.
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Judge Porter deemed Colorado's reasoning "compelling" in her decision. She contended that the state Board of Elections erred in declining an earlier attempt to remove Mr. Trump from the ballot.
Election on March 19, 2024, or suppress all of the votes that were voted in favor of him," she declared.
Donald J. Trump will not be allowed to appear on the ballot in the general primary by the Illinois State Board of Elections.
A spokesman for Trump declared the decision to be "unconstitutional" and promised to file an appeal.
"The Soros-funded Democrat front-groups continue to attempt to interfere in the election and deny President Trump his rightful place on the ballot," a spokeswoman stated.
Mr. Trump has already filed an appeal with the Supreme Court challenging the Colorado ruling.
Earlier this month, the Supreme Court heard arguments in the case and seemed dubious about Colorado's choice to remove Mr. Trump from the ballot.
A constitutional amendment from the Civil War era that prohibits anybody who has "engaged in insurrection or rebellion" from holding federal office is the basis for the legal challenge.
Nonetheless, the justices of the Supreme Court have questioned individuals speaking for Colorado voters who support Mr. Trump's ban harshly.
Judge Brett Kavanaugh, a conservative, questioned whether there would be a "disenfranchising effect" if people were not given the freedom to choose whether or not to support Donald Trump for president.
The decision by the Illinois judge was made in response to the Supreme Court's decision on Wednesday to consider Mr. Trump's case once more. Whether the former president is immune from suit because of his efforts to rig the 2020 election will be determined by the conservative majority court, which will vote 6-3 in favor of the former president.
