The centenary celebration will get underway shortly before 11 o'clock this morning, with the Garda Band leading a march through the streets.
People are being encouraged to come out and watch the event.
"We're going to leave Dungarvan Garda Station at about 10.45am," Sergeant Conor Cleary told WLR News, "and we're going to head for Dungarvan Castle, via Grattan Square.
"We'll go down Mary Street, through Grattan Square, up to the roundabout at the bridge, and then proceed right down the quay to Dungarvan Castle.
"At Dungarvan Castle the Mayor of Waterford will be present and also senior Garda management.
"Following this ceremony, all serving and retired members in the Dungarvan district will receive their centenary medal, which will be nice to mark the occasion."
Along with the Garda band, there will also be some very special guests participating in this morning's march.
"Part of this march will involve the Garda ceremonial unit, serving and retired members of An Garda Síochána, and also a number of Little Blue Heroes," Sergeant Cleary said.
"Little Blue Heroes are children with special needs who have been made honorary guards in recent years.
"They wear little Garda uniforms and it's very impressive.
"It's a great chance for them and their families to celebrate with their kids!"
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