2009–10 Dumbarton F.C. season

Following the success of the previous season, it was manager Jim Chapman's goal to consolidate the club's position in the Second Division.

However, Dumbarton were to be devastated before a ball was kicked with the death during the close season of the club captain, Gordon Lennon, from a motoring accident.

It was, however, to be a temporary blip and although there was no consistency in performances, a mid-table sixth place was achieved in the end.

In the Scottish Cup, local rivals Morton would be victorious in the third round, after a goalless draw.

Finally, it was no surprise that the League Challenge Cup would witness another first round exit, and it would be Morton again who would do the damage.