| Club: | Dumbarton |
| Season: | 1948–1949 |
| Manager: | William Guthrie |
| Stadium: | Boghead Park, Dumbarton |
| League: | Scottish League B Division |
| League Result: | 15th |
| Cup1: | Scottish Cup |
| Cup1 Result: | Third Round |
| Cup2: | Scottish League Cup |
| Cup2 Result: | Prelims |
| Cup3: | B Division Supplementary Cup |
| Cup3 Result: | First Round |
| League Topscorer: | Hugh Goldie (12) |
| Season Topscorer: | Hugh Goldie (17) |
| 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: | 1947–48 |
| Nextseason: | 1949–50 |
The 1948–49 season was the 65th Scottish football season in which Dumbarton competed at national level, entering the Scottish Football League, the Scottish Cup, the Scottish League Cup and the Supplementary Cup. In addition Dumbarton competed in the Stirlingshire Cup.
See main article: 1948-49 Scottish Football League. By mid November, Dumbarton were challenging the leaders of the B Division, but a disastrous spell, which saw only one victory from 17 games, meant that hopes faded and Dumbarton eventually finished 15th out of 16 with 22 points - 20 behind champions Raith Rovers.
Dumbarton's interest in the B Division Supplementary Cup was short lived with a first round exit to Cowdenbeath.
See main article: 1948–49 Scottish League Cup. Progress from their League Cup section was again to prove too much of a challenge for Dumbarton, finishing 4th and last, with just a draw being taken from their 6 games.
See main article: 1948–49 Scottish Cup. Dumbarton brought some cheer to their fans with some success in the Scottish Cup before losing out in the third round to A Division opponents Hearts.
Dumbarton won a thrilling first round tie against A Division Falkirk in the 'county' cup but due to other teams' commitments the competition was never completed.
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Source:[1]
| Player | From | Date | |
|---|---|---|---|
| George Paton | Hearts | 12 May 1948 | |
| Johnny Crichton | 15 Jun 1948 | ||
| John Fulton | 29 Jun 1948 | ||
| Peter Grant | 29 Jun 1948 | ||
| 2 Jul 1948 | |||
| Matt Lynch | 8 Aug 1948 | ||
| Joe Speirs | Glenryan Thistle | 23 Aug 1948 | |
| George Ferguson | 31 Aug 1948 | ||
| Jim Jamieson | Jamestown Athletic | 4 Oct 1948 | |
| Bob Stirling | Third Lanark | 20 Oct 1948 | |
| Archie McIndewar | Rangers | 3 Dec 1948 |
| Player | To | Date | |
|---|---|---|---|
| Jimmy Mulvaney | Luton Town | 29 May 1948 | |
| Charlie Bootland | Clyde | 27 Nov 1948 | |
| Alex Menzies | Cowdenbeath | 10 Dec 1948 | |
| Johnny Crichton | 23 Feb 1949 | ||
| John Fulton | Released | 10 Mar 1949 | |
| Matt Lynch | Freed | 30 Apr 1949 | |
| Archie McIndewar | Freed | 30 Apr 1949 | |
| Freed | 30 Apr 1949 |
Source:[2]
Dumbarton played only one competitive 'reserve' fixture by entering the Scottish Second XI Cup where they lost in the first round to Partick Thistle.