I am often asked if it is legal to miss work to serve as an election judge in Illinois.

Here is the law in question.

(10 ILCS 5/14-4.5)
    Sec. 14-4.5. Time off from work to serve as election judge. Any person who is appointed as an election judge under Section 13-1 or 13-2 may, after giving his or her employer at least 20 days' written notice, be absent from his or her place of work for the purpose of serving as an election judge. An employer may not penalize an employee for that absence other than a deduction in salary for the time the employee was absent from his or her place of employment.
    This Section does not apply to an employer with fewer than 25 employees. An employer with more than 25 employees shall not be required to permit more than 10% of the employees to be absent under this Section on the same election day.
(Source: P.A. 94-645, eff. 8-22-05.)