| Competition: | Lebanese Third Division |
| Season: | 2020–21 |
| Dates: | 19 March – 24 July 2021 |
| Winners: | Sporting Qlaileh |
| Promoted: | Sporting Qlaileh Shabab Majdal Anjar |
| Relegated: | Nojoom Beirut Homenetmen Ahli Sarba Sharq Okhwa Kharayeb Amal Maaraka Majd Tripoli Amal Salam Zgharta |
| Matches: | 174 |
| Total Goals: | 563 |
| Biggest Win: | Irshad Chehim 8–1 Sharq (17 April 2021) Salam Sour 8–1 Hilal Haret Naameh (27 June 2021) |
| Highest Scoring: | Nahda Ain Baal 9–3 Harouf (25 June 2021) |
| Prevseason: | |
| Nextseason: | 2021–22 |
The Lebanese Third Division (Arabic: الدوري اللبناني الدرجة الثالثة) is the third division of Lebanese football. It is controlled by the Lebanese Football Association. It operates on a system of promotion and relegation with the Lebanese Second Division and Lebanese Fourth Division.[1] [2]