The 42-year-old had denied driving at 83mph in a 70mph zone on the A9 in Perthshire on October 6 2012.
However, he was found guilty and given four penalty points, bringing the total number of points on his licence to 13. He was banned under the totting-up procedure.
The trial had originally been scheduled for June, however, it was postponed so Lennon could attend the club's pre-season tour of Germany.
Lennon, from Glasgow's west end, was caught in his 4x4 Audi Q7 by a speed camera at the Blackford junction.
His defence lawyer told the court that Lennon needed his licence for work and to attend charity events.
The ban comes a month after Lennon was cleared of using his mobile phone while driving.
Two police officers had claimed they saw Lennon using the keypad on a phone while driving on High Street, in Glasgow's Merchant City last summer.
But Lennon was found not guilty yesterday at Glasgow's Justice of the Peace Court after stipendiary magistrate Josephine MacLean ruled there was no case to answer.