Lee Jae-in Filmography
| 2026 | Spring Fever (TV Series) · as Choi Se-Jin |
| 2025 | Hi-Five · as Park Wanseo |
| 2025 | Our Unwritten Seoul (TV Series) · as Teen Yoo Mi-Ji / Yoo Mi-Rae |
| 2023 | FAQ · as Passenger |
| 2023 | Night Has Come (TV Series) · as Lee Yoon-Seo |
| 2022 | O'PENing (TV Series) · as Lim Yoon-Jae |
| 2021 | |
| 2021 | |
| 2021 | Racket Boys (TV Series) · as Han Se-Yoon |
| 2021 | Undercover (KR) (TV Series) · as Han Seung-Mi |
| 2020 | Hospital Playlist (TV Series) · as So-Mi |
| 2020 | Hello Dracula (TV Series) · as An-Na (teen) |
| 2019 | The Battle: Roar to Victory · as Chun-Hee |
| 2019 | Beautiful World (TV Series) · as Han Dong-Hee |
| 2019 | Svaha: The Sixth Finger · as Geum-Hwa |
| 2018 | |
| 2018 | Adulthood · as Kyung-Un |
| 2017 | Drama Stage (TV Series) · as Im Yoon-Jae |
| 2017 | I Can Speak · as Young Jung-Sim |
| 2017 | Tombstone Refugee · as Dabin |
| 2016 | Horror Stories III · as Dunko (segment 3) |
| 2015 | Six Flying Dragons (TV Series) · as Cast |
| 2015 | Sense8 (TV Series) · as Seon (young) |
| 2015 | Who Are You: School 2015 (TV Series) · as Ra-Jin |
| 2014 | Modern Farmer (TV Series) · as Min-Gi's Little Sister |
| 2014 | Futureless Things · as English Elementary School Student |
| 2014 | No Tears for the Dead · as Dai Ban Granddaughter |
| 2013 | Happiness for Sale · as Kid 5 |
| 2012 | Shut Up Family (TV Series) · as Da-Young |
| 2012 | Ice Adonis (TV Series) · as Ha Yoon-Hee (young) |
| 2010 | God's Quiz (TV Series) · as Ha-Young |
| 2010 | KBS Drama Special (TV Series) · as So-Hee |