Cook County State’s Attorney’s Office | 5,108 followers on LinkedIn. The State's Attorney's Office works to uphold public safety through the fair and efficient administration of justice. | With more than 700 attorneys, the Cook County State's Attorney's Office is the second-largest prosecutor's office in the nation. The CCSAO is responsible for the prosecution of all misdemeanor and felony crimes committed in Cook County, one of the largest counties in the United States. The CCSAO also serves as legal counsel for the government of Cook County and county office holders and employees, litigating Plaintiff and Defense oriented cases and providing legal counsel on a range of matters.