Marissa Madrigal has taken the oath of office to become Multnomah County chair.
Madrigal takes over for Jeff Cogen, who resigned this month after weeks of turbulence over his affair with an employee.
Madrigal was Cogen's chief of staff and designated successor. She will keep the job until next year's election and has said she will not seek a full term.
At Tuesday's ceremony, Madrigal delivered remarks in English and Spanish. She said she is driven to help every family thrive.