The selected panel of players is coached by Stan McDowell and captained by Jayne Pennefather. Jayne and her team-mates Meabh Donohoe, Irene Herlihy and Shannen Lane were part of the Irish squad which finished fourth in the tournament last year.
Announcing the current squad, McDowell said: "We are delighted to name the squad to take place in the UK School Games in Manchester. Women's rugby is on a high after great performances by the senior team in recent years and we were very pleased to have had over 200 girls from across the country try out for the squad in early April.
"The UK School Games represents a fantastic opportunity for the 12 girls selected to participate in a multi-sport event featuring 12 different sports with over 1,700 athletes creating an experience they will long remember."
IRELAND UNDER-18 GIRLS SEVENS Squad (Sainsbury's UK School Games, Manchester, September 4-7, 2014):
Chloe Blackmore (Carrick-on-Suir/Munster)
Meabh Donohoe (Tullow/Leinster)
Stacey Flood (Railway Union/Leinster)
Irene Herlihy (Mallow/Munster)
Jessica Hunt (Wicklow/Leinster)
Shannen Lane (Cavan/Ulster)
Zoe Lynch (Carrick-on-Suir/Munster)
Meabh O'Brien (Naas/Leinster)
Aisling O'Hagan (Thurles/Munster)
Jayne Pennefather (Carrigaline/Munster) (capt)
Louise Scully (Cill Dara/Leinster)