Ogier, 41, finished third in the season-closing Rally Saudi Arabia to pip Toyota teammate Elfyn Evans to the crown.
Ogier's exploit was all the more remarkable as he was competing as a 'part-time' driver this year, skipping three of the 14 rallies.
"What an incredible season," said the Frenchman who won six rallies this season.
"The battle with Elfyn has been really superb. There are no great champions without great rivals."
"He pushed us to the limits until the very last stage of the season," added Ogier before climbing onto the roof of his car to celebrate with his co-driver Vincent Landais.
Evans had arrived in Jeddah leading the standings by three points, but his hopes of finally ascending to the WRC throne after finishing runner-up four times were scuppered by a costly puncture on Friday.
Ogier's titles have come at the wheel of three different teams - claiming the first of four with Volkswagen in 2013, then two with Ford (2017-2018) and now adding a third to his 2020-2021 wins with Toyota.
Last year's champion Thierry Neuville took the honours in Saudi Arabia, appearing on the WRC calendar for the first time, from Adrien Fourmaux, with Ogier third and Evans only sixth.