Tickets go on sale at 9.00am tomorrow (Wednesday, 12 December) from Colwyn Leisure Centre, Venue Cymru and Ticketmaster, with prices having been frozen at the same rate as last season.
WRU Head of Rugby Joe Lydon said: "The north Wales public came out in force last season to support our youngsters, with all three of our home matches sold out ahead of matchday and we wanted to repay that faith by freezing the prices for this season.
"Eirias proved to be a fantastic venue for our Under 20 Six Nations matches last season with everyone involved in staging the matches showing a professionalism and enthusiasm for the games that helped to create a unique international experience for the players, coaches and supporters.
"We are delighted to have committed to Wales Under 20 playing their home Six Nations games in Colwyn Bay for this season and next.
"Danny Wilson's side performed superbly to finish third at the Junior World Championship in South Africa and they will be looking to build on that success this season starting with Wales Under 20 v Ireland on Friday, 1 February, 2013."
Wales Under 20 Six Nations - home matches - Eirias, Colwyn Bay
Wales Under 20 v Ireland Under 20 - Friday, 1 February - 19.10
Wales Under 20 v England Under 20 - Friday, 15 March - 19.35
Tickets are £15 for reserved seating and £10 (adults) and £5 (concessions) in the terrace and with last season's games all selling out well in advance of matchday, supporters are urged to act quickly to avoid disappointment.
Tickets will be on sale from the following outlets:
Colwyn Leisure Centre
01492 577900 or personal callers (Colwyn Bay Lesuire centre, Eirias Road, Colwyn Bay, LL29 7SP)
www.venuecymru.co.uk, 01492 872000 or personal callers (Venue Cymru, Y Promenad, Llandudno, LL30 1BB)
Telephone - 08442 777 888 or via wru.co.uk/tickets