Daniel Wiffen has earned a Bronze medal another medal as Ireland breaks its record for most wins at an Olympic tournament.
The Olympic champion earned a spot on the podium in the 1500m freestyle race.
America's Bobby Finke defended his Olympic title while Italy's Gregorio Paltrinieri secured second place.
Mr Finke has also set a new world record, clocking a time of 14.30.67.
Mr Wiffen said he "can't be more happy" - even if the "race didn't go his way".
"When you hit Gold the first time you race, you kind of don't want less than that," he said.
"But I'm happy, we've never had a medal before in this competition at the Olympics for men - to come away with two, I'm very happy."
The 23-year-old said he was hoping to break a world record today - but ultimately it was Mr Finke's victory.
"Today wasn't the day," he said. "But we will be back better next time.
"I'm ready to put the pool behind me now until next season.
"Today's race didn't go my way - but who cares? I'm an Olympic champion."
Mr Wiffen is the first Irish man to win two Olympic medals for swimming in one season.
He is also the first Irish person to win a Gold medal for the Men’s 800m Freestyle.
Mr Wiffen’s success is also Ireland’s as the team has now surpassed its previous record for most medals won in a single Olympic.
Ireland won six medals in the 2012 London Olympics but has secured seven medals.
This includes boxer Kellie Harrington’s minimum guaranteed silver medal as she progresses to the Women’s Lightweight final on Tuesday.
Rhys McClenaghan became the first Irish person to win a Gold medal in Men's Pommel Horse yesterday.
Paul O’Donovan and Fintan McCarthy defended their Olympic Gold title in Men’s Rowing Lightweight Double Sculls on Friday - making Mr O'Donovan the first Irish person to win three medals in a row.
Swimmer Mona McSharry also secured a bronze medal for Ireland in the Women's 100m Breaststroke beating Italy's Benedetta Pinato by just one-hundredth of a second.
Daire Lynch and Philip Doyle also took home bronze at the Men’s Double Sculls final on August 1st.
It was a successful first week at the Olympics for Team Ireland, which is currently ranked 13th for most Gold medals and 18th for medals overall.
Nielsen’s Gracenote Virtual Medal Table has projected Ireland to win 10 medals in Paris – two gold, three silver and five bronze.