The shooting happened around 9 p.m. in the 500 block of West Marshall Street, near George Street.
Authorities said the victim was transported to an area hospital with serious injuries. There was no immediate word on their condition.
Action News has learned that the victim may be a juvenile.
Police have not released details about what led up to the shooting.
The investigation remains ongoing, and it's still unclear if any arrests were made.
Anyone with information on the shooting is asked to call Norristown police.