Clerks, judges and other publicly elected Cook County officials took the oath of office to mark the start of new terms.
Swearing-in ceremonies were held Monday for county officials who were elected or re-elected in November.
That included Clerk of the Circuit Court of Cook County Dorothy Brown, who spoke about her 12 years in office after taking the oath.
Dozens of Cook County circuit judges were sworn into office during a downtown Chicago ceremony. State's attorney Anita Alvarez also took the oath Monday.
Newly elected county officials' terms started in December. Ceremonies were held Monday because it was the first business day.
State and federal lawmakers elected last month will take oaths in January when their new terms begin.