| Club: | Dumbarton |
| Season: | 1955–1956 |
| Manager: | Peter McGown |
| Stadium: | Boghead Park, Dumbarton |
| League: | Scottish League B Division |
| League Result: | 4th |
| Cup1: | Scottish Cup |
| Cup1 Result: | Fourth round |
| Cup2: | Scottish League Cup |
| Cup2 Result: | Quarter-final |
| League Topscorer: | Hugh Gallacher (36) |
| Season Topscorer: | Hugh Gallacher (46) |
| Pattern La1: | _black_hoops |
| Pattern B1: | _goldhoops |
| Pattern Ra1: | _black_hoops |
| Pattern So1: | _goldtop |
| Leftarm1: | ffc100 |
| Body1: | 000000 |
| Rightarm1: | ffc100 |
| Shorts1: | ffffff |
| Socks1: | 000000 |
| Prevseason: | 1954–55 |
| Nextseason: | 1956–57 |
The 1955–56 season was the 72nd Scottish football season in which Dumbarton competed at national level, entering the Scottish Football League, the Scottish Cup and the Scottish League Cup. In addition Dumbarton competed in the Stirlingshire Cup.
See main article: 1955–56 Scottish Football League. The return to the 'top' divisions in Scottish League football was a success in many ways with Dumbarton always challenging the top places in the Second Division throughout the campaign - but eventually had to settle for a 4th place out of 19, only 7 points behind champions Queen's Park (and just 4 short of a promotion place).
See main article: 1955–56 Scottish Cup. Dumbarton negotiated a tricky tie against Highland League opposition in the third round of the Cup, before losing out to Dundee United in the next round.
See main article: 1955–56 Scottish League Cup. For the first time, Dumbarton qualified from their League Cup section, winning 3 and drawing the other of their 4 matches. In a play off, Morton were seen off - before Division A St Mirren were to prove to be too much for them in the quarter-final.
The county cup semi final tie was a thriller, where Dumbarton lost by the odd goal in 11 against A Division opponents Falkirk.
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Source:[1]
Amongst those players joining and leaving the club were the following:
| Player | From | Date | |
|---|---|---|---|
| John Glover | 2 Jul 1955 | ||
| Tom Whalen | 4 Aug 1955 | ||
| Joe Harvey | 7 Aug 1955 | ||
| John Brooks | 10 Sep 1955 | ||
| Benny Cairns | 12 Oct 1955 | ||
| Eddie O'Donnell | 10 Aug 1954 | ||
| Billy McKeown | 21 Jan 1956 |
| Player | To | Date | |
|---|---|---|---|
| John Brooks | Freed | 30 Apr 1956 | |
| Don Cornock | Freed | 30 Apr 1956 | |
| Tommy Irwin | Freed | 30 Apr 1956 | |
| Jimmy McDonald | Freed | 30 Apr 1956 | |
| Jimmy Ritchie | Freed | 30 Apr 1956 |
Source:[2]
Dumbarton only played one official 'reserve' match in the Second XI Cup, losing in the first round to Partick Thistle.