Updated: May 26, 2023
Here are the most watched TV series in South Korea in May 2023: TV ratings are based on nationwide viewership data from Nielsen Korea.
| Nationwide Rating | Title | Network | Cast / Creators |
| 20.4% | The Real Has Come! (2023) | KBS2 | Starring: Ahn Jae-hyun, Baek Jin-hee Writer: Jo Jeong-joo Director: Han Joon-seo |
| 18.4% | Doctor Cha (2023) | JTBC | Starring: Uhm Jung-hwa, Kim Byung-chul Writer: Jung Yeo-Rang Director: Kim Dae-Jin |
| 14.5% | Apple Of My Eye (2023) | KBS1 | Starring: Seo Jun-young, Yoon Da-young, Song Chae-hwan, Choi Jae-won, Choi Phillip Writer: Baek Eun-jung, Chae Hye-yeong, Yoo Sang-young Director: Choi Ji-yeong |
| 13.5% | Dr. Romantic 3 (2023) | SBS | Starring: Han Suk-kyu, Ahn Hyo-seop, Lee Sung-kyung Writers: Kang Eun Kyung, Lim Hye Min Director: Kang Bo-seung |
| 11.8% | Woman In A Veil (2023) | KBS2 | Starring: Shin Go-eun, Choi Yoon-young, Lee Chae-young Writer: Lee Jeong-dae Director: Shin Chang-seok |
| 9.9% | The Good Bad Mother (2023) | JTBC | Starring: Ra Mi-ran, Lee Do-hyun, Ahn Eun-jin Writer: Bae Se Young Director: Shim Na Yeon |
| 7.1% | Tale Of The Nine-Tailed 1938 (2023) | tvN | Starring: Lee Dong-wook, Kim Bum, Kim So-yeon, Ryu Kyung-soo Writer: Han Woo-ri Director: Kang Shin-hyo |
Source: Nielsen Korea
KORB 