The Czech left-hander completely outplayed the 20-year-old Canadian -- playing in her first major final -- with her big serve, aggressive returns and flat groundstrokes.
"I had a great tactic from my coach," Kvitova said in a postgame interview. "... And I just wanted to be here again with the trophy."
Kvitova, also the 2011 champion, put on a clinic of power tennis, ripping baseline winners off both wings and leaving Bouchard looking helpless. Kvitova won the final seven games, finishing with another clean winner -- a cross-court backhand.
When asked to compare this title with her previous Wimbledon win, Kvitova said: "I can't say that it's more special but definitely after three years just to stand here with the trophy again is amazing."
Bouchard was the first Canadian to reach a Grand Slam final.
"It was really tough for me today," she said, "[but] I feel like it's a step in the right direction."
"I don't know if I deserve all your love today," Bouchard continued, talking to the crowd, "but I really appreciate it."
She was named after Britain's Princess Eugenie, granddaughter of Queen Elizabeth II. The princess was watching from the front row of the Royal Box.
The Associated Press contributed to this report.