Class X Felony

• Between 6 and 30 years in State Penitentiary; and/or
• Fine of up to $25,000
• Examples: Aggravated Criminal Sexual Assault

Class 1 Felony

• Between 4 and 15 years in State Penitentiary; and/or
• Fine of up to $25,000
• Examples: Criminal Sexual Assault, Possession of Heroin, Cocaine, LSD

Class 2 Felony

• Between 3 and 7 years in State Penitentiary; and/or
• Fine of up to $25,000
• Examples: Arson

Class 3 Felony

• Between 2 and 5 years in State Penitentiary; and/or
• Fine of up to $25,000
• Examples: Aggravated Battery, Reckless Vehicular Homicide

Class 4 Felony

• Between 1 and 3 years in State Penitentiary; and/or
• Fine of up to $25,000
• Examples: Aggravated Assault, Stalking
  
  

Class A Misdemeanor

• Up to 1 year in County Jail; and/or
• Fine of up to $2,500
• Examples: Battery, DUI, Possession of Marijuana (10-30 grams), Possession of Firearms, Reckless Driving, Proposed (not law yet) Negligent Vehicular Homicide
  
  

Class B Misdemeanor

• Up to 6 months in County Jail; and/or
• Fine of up to $1,500
• Examples: Possession of Marijuana (2.5-10 grams), Harassment

Class C Misdemeanor

• Up to 30 days in County Jail; and/or
• Fine of up to $1,500.
• Examples: Assault, Possession of Marijuana (under 2.5 grams), Failure to Reduce Speed to Avoid an Accident

adapted from: http://www.myillinoisdefenselawyer.com/illinois-criminal-code-and-laws/