Updated: September 25, 2023
Here are the most watched TV series in South Korea in September 2023: TV ratings are based on nationwide viewership data from Nielsen Korea.
| Nationwide Rating | Title | Network | Cast / Creators |
| 23.6% | The Real Has Come! (2023) | KBS2 | Starring: Ahn Jae-hyun, Baek Jin-hee Writer: Jo Jeong-joo Director: Han Joon-seo |
| 18.4% | Live Your Own Life (2023) | KBS2 | Starring: UEE, Ha Jun Screenwriter: Jo Jeong-seon Director: Kim Hyeong-il |
| 15.2% | 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 |
| 13.0% | Unpredictable Family (2023) | KBS1 | Starring: Nam Sang-ji, Lee Do-hyeon, Kang Debin, Lee Hyona, Lee Jong-won Screenwriter: Moon Yeong-hoon Director: Kim Seong-geun |
| 12.2% | My Dearest (2023) | MBC | Starring: Namgoong Min, Ahn Eun-jin, Lee Hak-joo, Lee Da-in Writer: Hwang Jin Young Director: Kim Sung Yong |
| 10.4% | The Elegant Empire (2023) | KBS2 | Starring: Kim Jin Woo, Han Ji Wan, Kang Yul, Son Sung Yoon, Lee Sang Bo, etc. Writer: Han Young-Mi Director: Park Ki-Ho |
| 9.6% | Behind Your Touch (2023) | JTBC | Starring:Â Han Ji-min, Lee Min-ki, Suho Writers:Â Lee Nam-gyoo, Oh Bo-hyeon, Kim Da-hee Directors:Â Kim Seok-yoon, Choi Bo-yoon |
| 9.3% | The First Responders 2 (2023) | SBS | Starring: Kim Rae-won, Son Ho-jun, Gong Seung-yeon Writer: Min Ji-eun Director: Shin Kyung-soo |
| 7.7% | The Escape of the Seven (2023) | SBS | Starring: Uhm Ki-joon, Hwang Jung-eum, Lee Joon, Lee Yoo-bi, Shin Eun-kyung, Yoon Jong-hoon, Jo Yoon-hee, Jo Jae-yoon, Lee Deok-hwa Screenwriter: Kim Soon-ok Director: Joo Dong-min |
| 6.3% | Meant To Be (2023) | MBC | Starring: Jeon Hye-Yeon, Seo Han-gyeol, Jeong Woo-yeon, Jin Ju-hyung Writer: Yeo Jung Mi Director: Kim Jin Hyeong |
| 6.0% | The Uncanny Counter 2: The Counter Punch (2023) | tvN | Starring: Jo Byeong-gyu, Yoo Joon-sang, Kim Se-jeong, Yeom Hye-ran, Ahn Suk-hwan, Jin Sun-kyu, Kang Ki-young, Yoo In-soo Writers: Yeo Ji-na, Yoo Seon-dong, Kim Sae-bom Directors: Yoo Seon-dong, Park Bong-seop |
Source: Nielsen Korea
KORB 