| Competition: | Hong Kong Fourth Division League |
| Season: | 2012–13 |
| Winners: | Yau Tsim Mong |
| Promoted: | Yau Tsim Mong Mutual Kwong Wah Sun Source |
| Relegated: | Blake Garden |
| League Topscorer: | Poon Ka Wai (9 goals) |
| Biggest Home Win: | Mutual 10–1 Central & Western |
| Biggest Away Win: | Blake Garden 0–16 Sun Source |
| Highest Scoring: | Blake Garden 0–16 Sun Source Yau Tsim Mong 13–3 Solon |
| Matches: | 210 |
| Total Goals: | 927 |
| Longest Wins: | 13 games Yau Tsim Mong |
| Longest Unbeaten: | 13 games Yau Tsim Mong |
| Longest Winless: | 21 games Blake Garden |
| Longest Losses: | 12 games Blake Garden |
| Prevseason: | 1955–56 |
| Nextseason: | 2013–14 |
2012–13 Hong Kong Fourth Division League is the 2nd season, as well as the 1st season after the re-introduction of Hong Kong Fourth Division League, a football league in Hong Kong.
The 2012–13 season of the Hong Kong Fourth Division League consists of 15 clubs, including 9 teams relegated from 2011–12 Third 'A' Division, 4 teams relegated from 2011–12 Third 'District' Division and 2 newly joined teams.
The detail of the clubs is as follows.
| Club | League in 2011–12 | Position in 2011–12 | |
|---|---|---|---|
| Blake Garden | Third 'A' Division | 17th | |
| Central & Western District | Third 'District' Division | 5th | |
| Islands | Newly joined | N/A | |
| Kwong Wah | Third 'A' Division | 18th | |
| Lung Moon | Third 'A' Division | 11th | |
| Mutual | Newly joined | N/A | |
| North District | Third 'District' Division | 8th | |
| Ornament | Third 'A' Division | 13th | |
| Sai Kung | Third 'District' Division | 6th | |
| Sai Kung Friends | Third 'A' Division | 14th | |
| Solon | Third 'A' Division | 12th | |
| St. Joseph's | Third 'A' Division | 19th | |
| Sun Source | Third 'A' Division | 16th | |
| Tung Sing | Third 'A' Division | 15th | |
| Yau Tsim Mong | Third 'District' Division | 7th |