List of South Korean films of 2018
The following is a list of South Korean films that were released in theaters in 2018.
Box office
The highest-grossing South Korean films released in 2018, by domestic box office gross revenue, are as follows:| Rank | Title | Distributor | Domestic gross |
| 1 | ' | Lotte Cultureworks | $83,396,423 |
| 2 | The Great Battle | Next Entertainment World | $37,639,706 |
| 3 | Intimate Strangers | Lotte Cultureworks | $36,027,434 |
| 4 | Believer | Next Entertainment World | $35,320,688 |
| 5 | The Spy Gone North | CJ Entertainment | $34,759,333 |
| 6 | Dark Figure of Crime | Showbox | $26,801,755 |
| 7 | Default | CJ Entertainment | $25,092,037 |
| 8 | Keys to the Heart | CJ Entertainment | $22,300,975 |
| 9 | ' | Warner Bros. Korea | $22,126,405 |
| 10 | The Accidental Detective: In Action | CJ Entertainment | $21,856,331 |