The family of Sean Farrelly have made an appeal after he went missing on Friday night/Saturday morning.
It is understood Sean was last seen near the Palace nite club in Navan and has been missing since then.
Sean was wearing jeans, white runners and a maroon jumper.
The family ask if anyone has seen him or if they have any information to contact the family directly or Navan Garda Station on 046 907 9930.
Teams from Meath River Rescue, Meath Civil Defence and members of Simonstown GAA have been involved conducting searches of the Blackwater and Boyne rivers.