The first championship celebration took place inside a sold-out Bankers Life Fieldhouse.
WNBA Finals MVP Tamika Catchings led all scorers in the clinching game with 25 points. Erin Phillips had 18 points.
"It was huge. I honestly think Minnesota was rattled by our fans, no question. Adrenaline, the energy put forth inside that arena, our team fed off of all of that for every basket, every steal, turnover or rebound. You could feel it in the arena," said media relations director Kevin Messenger.
Several sports celebrities tweeted their congratulations to the team following Sunday's win.
"Yes Yes Yes, Fever wins WNBA Championship!!! Tamika Catchings deserves all of this, heart n soul!!!!!" tweeted former Pacers star Reggie Miller.
"Congratulations to the Indiana Fever. What a great example of staying tough and together throughout the entire playoffs," wrote Butler basketball coach Brad Stevens.
"Congrats to the Fever on winning the WNBA finals! Special S/O to T. Catch on her 1st one! I know the feeling," tweeted LeBron James.