Grundy County early voting in Annex. Any qualified Grundy County voter may vote prior to Election Day at the Early Voting site established by the election authority. Any vote cast during Early Voting is final and cannot be revoked. The voter is not eligible to cast a vote on Election Day. No ID is required to vote early. If you have any questions, please call the Grundy County Clerk’s Office at (815) 941-3222, Option 1.