720 ILCS 5/1-6
Criminal actions shall be tried in the county where the offense was committed, except as otherwise provided by law. The State is not required to prove during trial that the alleged offense occurred in any particular county in this State. When a defendant contests the place of trial under this Section, all proceedings regarding this issue shall be conducted under Section 114-1 of the Code of Criminal Procedure of 1963. All objections of improper place of trial are waived by a defendant unless made before trial.
If a person committing an offense upon the person of another is located in one county and his victim is located in another county at the time of the commission of the offense, trial may be had in either of said counties.
If cause of death is inflicted in one county and death ensues in another county, the offender may be tried in either county. If neither the county in which the cause of death was inflicted nor the county in which death ensued are known before trial, the offender may be tried in the county where the body was found.
If the commission of an offense commenced outside the State is consummated within this State, the offender shall be tried in the county where the offense is consummated.
If an offense is committed on any of the navigable waters bordering on this State, the offender may be tried in any county adjacent to such navigable water.
If an offense is committed upon any railroad car, vehicle, watercraft or aircraft passing within this State, and it cannot readily be determined in which county the offense was committed, the offender may be tried in any county through which such railroad car, vehicle, watercraft or aircraft has passed.
A person who commits theft of property may be tried in any county in which he exerted control over such property.
A person who commits the offense of bigamy may be tried in any county where the bigamous marriage or bigamous cohabitation has occurred.
A person who commits the offense of kidnaping may be tried in any county in which his victim has traveled or has been confined during the course of the offense.
A person who commits the offense of pandering as set forth in subdivision (a)(2)(A) or (a)(2)(B) of Section 11-14.3 may be tried in any county in which the prostitution was practiced or in any county in which any act in furtherance of the offense shall have been committed.
A person who commits the offense of treason may be tried in any county.
If criminal defamation is spoken, printed or written in one county and is received or circulated in another or other counties, the offender shall be tried in the county where the defamation is spoken, printed or written. If the defamation is spoken, printed or written outside this state, or the offender resides outside this state, the offender may be tried in any county in this state in which the defamation was circulated or received.
A person who commits an inchoate offense may be tried in any county in which any act which is an element of the offense, including the agreement in conspiracy, is committed.
Where a person in one county solicits, aids, abets, agrees, or attempts to aid another in the planning or commission of an offense in another county, he may be tried for the offense in either county.
A person who commits the offense of child abduction may be tried in any county in which his victim has traveled, been detained, concealed or removed to during the course of the offense. Notwithstanding the foregoing, unless for good cause shown, the preferred place of trial shall be the county of the residence of the lawful custodian.
If a person is charged with more than one violation of identity theft or aggravated identity theft and those violations may be tried in more than one county, any of those counties is a proper venue for all of the violations.
720 ILCS 5/1-6