The average annual salary of a criminal justice major is $55,000. Chicago, Dallas, Houston, Las Vegas and San Diego offer particularly high paychecks to a criminal justice major. Criminal justice is a very wide field that offers plenty of job opportunities. It relates to the study of laws concerning criminal behavior. Those who study criminal justice include the police, lawyers and people working in a judiciary capacity such as judges and clerks. A criminal justice major can specialize in any one of the aspects of criminal justice, including forensics, criminal investigation, and criminal law.