The county's state district judges unanimously backed Chang, who heads the county attorney's compliance division, over three others following several divided votes.
Under state law, a replacement had to have the judges' unanimous support, and all 59 of the county's state district judges had to vote. Judge Levi Benton made Chang the winner when he flew in from a Hawaiian honeymoon and cast his vote for her.
"A good clerk can help run the courts smoothly," Chang said. "It will be a new challenge for me, and I am very excited about that."
Chang will be sworn in today after Commissioners Court establishes a bond in her name, as is required under a state law.