It happened around 3:50 Sunday afternoon on the 400 block of N. Madison Street.
Arriving officers found the victim in a parking lot suffering from a gunshot wound.
Authorities say that a preliminary investigation has revealed that the teenager was leaving a corner store when he heard gunfire and realized he was shot.
The victim was taken to Christiana Hospital in stable condition.
Police continue to investigate.
Anyone with information is asked to call Wilmington Police at 302-576-3990. Tips can also be submitted to Crime Stoppers at 1-800-847-3333 or on line at www.tipsubmit.com.