1912–13 Dumbarton F.C. season

Dumbarton's seventh successive season in the Second Division saw their worst performance since their return to league football in 1906, but still managed a 6th place finish with 29 points, 5 behind champions Ayr United.

As it was both the bottom 'top flight' clubs - Partick Thistle and Queen's Park - were to retain their places, and in addition to Ayr United, the Second Division champions, it was Dumbarton that would step up to the First Division - beating Cowdenbeath with the chairman's casting vote.

The Scottish Cup campaign saw Dumbarton disposing of First Division opponents before losing to eventual champions Falkirk in the fourth round.

During the season, 3 'friendly' matches were played, winning 1, drawing 1 and losing 1, scoring 4 goals and conceding 4.

Dumbarton lost in the second round of the Scottish Second XI Cup to Kilmarnock.