In addition Dumbarton competed in the Dumbartonshire Cup.
In their ninth consecutive season in the Second Division, things were looking bright for Dumbarton's league challenge, as at the turn of the year they were lying only a point behind a promotion place.
However a run of 5 straight defeats in January 1931 snuffed out these hopes and in the end Dumbarton finished a midtable 10th out of 20, with 38 points - 23 behind champions Third Lanark.
Dumbarton retained the Dumbartonshire Cup, again beating Clydebank in the final, with Willie Parlane scoring all five goals.
Source:[103] Stewart Lennie and Willie Parlane earned their first amateur caps playing for Scotland against Wales and England respectively in the Amateur Home Internationals.