| IV liiga | |
| Pixels: | 140 |
| Country: | Estonia |
| Confed: | UEFA |
| Promotion: | III liiga |
| Relegation: | — |
| Levels: | 6 |
| Domest Cup: | Estonian Cup Estonian Small Cup |
IV liiga is the sixth and lowest football league organised by the Estonian Football Association. Its season starts in April and lasts until October.
| IV Liiga North/East | |
| Pixels: | 140 |
| Teams: | 8 |
| Champions: | Tallinna Depoo |
| Season: | 2017 |
| IV Liiga South | |
| Pixels: | 140 |
| Teams: | 7 |
| Champions: | Valga FC Warrior |
| Season: | 2017 |
| IV Liiga North/West | |
| Pixels: | 140 |
| Teams: | 7 |
| Champions: | Haapsalu JK |
| Season: | 2017 |