Much seems to be said about crime and criminality this century than before and especially in developing countries. This study attempted to examine criminality among youths and its effects to development in developing countries. This led to trying to establish any parallels and differences and probably why between developed and developing countries using available scholarly works in secondary and primary materials. This prompted a deliberate effort to find out the causes of Criminality among Youths in general and in particular to the developing countries, establishing the trends in criminality among youths in developing countries, and finding the effects of criminality to development in developing countries. The study concluded by avidly pointing that crime is an interruption to development, yet it is caused due to many factors psycho-social, economic, and politically based factors that need urgency in solution finding to alleviate their detriment.