(a) A sheriff may serve any process or make any arrest in a municipality or a part of a municipality located in the county in which the sheriff was elected that any officer of that municipality is authorized to make under this Code or any ordinance passed under this Code.
     (b) Police officers may serve summons for violations of ordinances occurring within their municipalities. In municipalities with a population of 1,000,000 or more, active duty or retired police officers may serve summons for violations of ordinances occurring within their municipalities.

Terms Used In Illinois Compiled Statutes 65 ILCS 5/1-2-11

  • Arrest: Taking physical custody of a person by lawful authority.
  • Municipalities: has the meaning established in Section 1 of Article VII of the Constitution of the State of Illinois of 1970. See Illinois Compiled Statutes 5 ILCS 70/1.27
  • police force: shall be construed to include such persons in the employ of a municipality as members of the department of police, who are or shall hereafter be appointed and sworn as policemen. See Illinois Compiled Statutes 5 ILCS 70/1.20
  • Summons: Another word for subpoena used by the criminal justice system.

     (c) In addition to the powers stated in Section 8.1a of the Housing Authorities Act, in counties with a population of 3,000,000 or more inhabitants, members of a housing authority police force may serve process for eviction actions commenced by that housing authority and may execute eviction orders for that housing authority.