Members of the Barnsley North East Neighbourhood Policing Team were conducting patrols when they received information about a sighting of a teenager who was carrying the weapon.
The male was located with an uncased, unloaded air rifle which was seized.
A spokesperson for the policing team said: “It is an offence to have a loaded or unloaded air weapon in a public place without lawful authority or a reasonable excuse.
“It is also an offence for any individual under eighteen to have in their possession an air weapon.”
