The issue of dealing with illegal immigrants has been a topic of hot debate in recent years. This is so because a rapid increase in illegal immigrants is being reported in the developed nations and more so in the United States in recent days. Precisely, Arizona has fro the last three years reported a drastic increase in illegal immigrants. This scenario has been associated with the increase in crime, pressure on employment opportunities, evasion of taxes and worse still an increase in terrorists’ activities. The implementation of the immigration law in Arizona has received mixed reactions from different people; whereby some are in support and others are in opposition of the law. The effects and crimes being committed by illegal immigrants in Arizonan and the US in general has been unbearable thus leading to the cause of law enforcement to curb the problem. This paper will discuss and profoundly analyze the concept of illegal immigration in Arizona.