The Spireites, then managed by John Sheridan, secured top spot with a 3-1 win against Gillingham at the then-named b2net Stadium on May 7.
Town scored three times in the second-half with the goals coming from Danny Whitaker, Jack Lester and Dean Smalley.
To celebrate the anniversary, we have delved into our archive to bring you these great pictures from the day.
1. Chesterfield champions
Jack Lester is denied by Alan Julian of Gillingham during the npower League Two match between Chesterfield and Gillingham at the B2Net Stadium on May 7, 2011. Photo: Laurence Griffiths
2. Chesterfield champions
Fans cheer on the Spireites during the game against Gillingham. Photo: Laurence Griffiths
3. Chesterfield champions
Danny Whitaker rounds Alan Julian of Gillingham to score the opening goal. Photo: Laurence Griffiths
4. Chesterfield champions
Danny Whitaker celebrates his goal with Craig Davies. Photo: Laurence Griffiths