| Competition: | I Lyga |
| Season: | 2013 |
| Winners: | Klaipėdos Granitas |
| Promoted: | Klaipėdos Granitas FK Trakai |
| Relegated: | Polonija |
| Matches: | 162 |
| League Topscorer: | Aivaras Lyberis Edgaras Mastianica (18 goals) |
| Prevseason: | 2012 |
| Nextseason: | 2014 |
The 2013 I Lyga (also known as LFF I Lyga) is the 24th season of the I Lyga, the second-tier association football league of Lithuania. The season started on 8 April 2013 and end is planned for 24 September 2013.[1]
The league changed its number of teams, increasing it from 10 teams in 2012 I Lyga to 12 teams in 2013. Two teams of 2012 resigned – FK Granitas Vilnius and NFA Kaunas (replaced by FM Spyris Kaunas), and another two were relegated – FK Venta Kuršėnai and FK Kėdainiai. From LFF II lyga were admitted 5 teams – 3 from zone South (FK Žalgiris-3 Vilnius, FK Šilas Kazlų Rūda and FM Spyris Kaunas) and 2 from zone West (FK Lokomotyvas Radviliškis and FK Klaipėdos Granitas). A newly created team of FK Baltija Panevėžys was also allowed to start at I lyga in 2013.
| Club | Location | Stadium | 2012 I Lyga | |
|---|---|---|---|---|
| FK Baltija Panevėžys | Panevėžys | Panevėžio futbolo akademijos stadionas | no league | |
| FK Klaipėdos Granitas | Klaipėda | Klaipėdos m. centrinis stadionas | 4th (LFF 2 lyga - West) | |
| FK Lietava Jonava | Jonava | Jonavos centrinis stadionas | 1st | |
| FK Lokomotyvas Radviliškis | Radviliškis | Panevėžio futbolo akademijos stadionas, Panevėžys | 1st (LFF 2 lyga - West) | |
| FK Nevėžis Kėdainiai | Kėdainiai | Kėdainių miesto stadionas | 2nd | |
| FK Palanga | Palanga | Palangos centrinis miesto stadionas | 8th | |
| FK Polonija Vilnius | Vilnius | Vingio parko stadionas | 5th | |
| FK Šilas Kazlų Rūda | Kazlų Rūda | Kazlų Rūdos stadionas | 4th (LFF 2 lyga - South) | |
| FK Šilutė | Šilutė | Šilutės miesto stadionas | 7th | |
| FM Spyris Kaunas | Kaunas | Nacionalinės futbolo akademijos stadionas | 5th (LFF 2 lyga - South) | |
| FK Trakai | Trakai | Trakų naujasis stadionas | 4th | |
| FK Žalgiris-3 Vilnius | Vilnius | Vilniaus LFF stadionas | 3rd (LFF 2 lyga - South) |
Semi-finals:Syris 2-3(a.e.t.) Kaunas
Final:Kaunas 0-0 (a.e.t.), 1-3p Trakai
As of 20 August 2013.
| Pos. | Player | Club | Goals |
|---|---|---|---|
| 1 |  Aivaras Lyberis | FK Nevėžis Kėdainiai | 15 |
| 2 | Aretas Gėgžna | FK Nevėžis Kėdainiai | 9 |
| Edgaras Mastianica | FK Klaipėdos Granitas |