The branch was started many years ago by Bill Hallam at the Wynnstay - now the Three Eagles - and enjoyed by many with memories of the sea.
Spokesperson Trefor Williams said: "Sadly, membership numbers have gradually declined.
"The nearest RNA branches are at Wrexham and Oswestry, which continue to thrive."
He added: "There will be a small ceremony at the war memorial at 11am on Thursday, March 21 in St Collen' Church where the standard will be laid up.
"Many thanks to all that have supported the branch. Thanks too must go to RAFA Club which has played host to our meetings in recent years."