"We can now reset and refocus our efforts on Rally Australia, where we have our sights set much higher."
A tense last leg culminated at the Power Stage finale alongside Llyn Brenig reservoir. Title rival Thierry Neuville charged to fastest time to claim maximum bonus points, while Ogier crept into a points-paying position by 0.1sec to seal the title with a round to spare.
"I had big emotions on the finish line," said Ogier. "It's been a tough year and we've all had to work very hard. It's so amazing to be champion with M-Sport World Rally Team."
Evans' victory offset the crushing disappointment of losing by 0.7sec to Neuville in Argentina six months ago in the third-closest finish in history.
"I'm very grateful to everyone who has stuck by me through all these years. A lot of people have supported me and this win is for them," said the 28-year-old former British champion.
To seal a remarkable weekend for Ogier and Evans, their M-Sport team lifted the manufacturers' title for the first time since 2007. Their privately-run squad toppled three of the world's biggest car companies after finishing on the podium on every round to date.
Andreas Mikkelsen did his best to relegate Ogier to assist teammate Neuville. The Norwegian overhauled Jari-Matti Latvala to finish fourth, 4.6sec off the podium. Latvala struggled with the handling of his Toyota Yaris and finished half a second behind.