As well as bringing the Spaniard "La Decima" - his 10th triumph in Paris - it was also Nadal's15th grand slam overall, putting him outright second on the all-time list behind rival Roger Federer, who has 18.
2013-Became the first man with eight titles at the same grand slam tournament when he beat fellow Spaniard David Ferrer in the French Open final.
The Spaniard, now a 15-time Grand Slam victor, eased to victory in the French capital to the delight of those in attendance.
The 32-year-old Swiss hit his head with his racket several times during the match, while he also smashed his racket after giving up two set points to Nadal at the end of the second.
"If you're not completely free. you don't want him to take the lead and play even more freely", said Wawrinka, who became US Openchampion previous year.
Nadal, who dropped to the court and covered his eyes when Wawrinka netted the final shot, saved the one break point he faced in the third game of the first set.
Nadal was irresistible nearly from the off on Sunday, showing the kind of form that had seen him breeze through to the final while dropping just 29 games.
King Of Clay is no longer a suitable title for Rafael Nadal when it comes to the French Open.
"It's hard to compare with other tournaments but the nerves and adrenaline I feel, it's like no other place". "Roland Garros is the most important tournament for me".
Rewinding the clock to the days when he was untouchable on the crushed brick dust, the 31-year-old turned 2015 championWawrinka into a human punchbag, winning in just over two hours.
"I think today, if you play Rafa, if you're not completely free with what you think and what you're gonna do and not completely relaxed the way you're gonna play, you have no chance". "It is true that this one is going to be one of the more special for the number, for what happened on the ceremony after the final, for so many things", he said.
Third seed Wawrinka arrived full of confidence as, at 32, he tried to become the oldest French Open victor since Andres Gimeno in 1972. But there was no doubt what reclaiming the title on his beloved Parisian clay meant.