The Blues beat Cheltenham 6-1 on the final day of the campaign to be crowned champions, having only topped the table for 32 minutes throughout the entire season.
Scroll down and click through the pages to see all the best celebratory pictures from the day...
17. Pompey celebrate their dramatic League Two title triumph
Players and staff toast the triumph. Photo: Joe Pepler
18. Pompey celebrate their dramatic League Two title triumph
Noel Hunt looks at the final League Two table. Photo: Joe Pepler
19. Pompey celebrate their dramatic League Two title triumph
Pompey players and staff celebrate the triumph. Photo: Joe Pepler
20. Pompey celebrate their dramatic League Two title triumph
Pompey players and staff celebrate. Photo: Joe Pepler