Lee Si-won Filmography
| 2023 | Maestra: Strings of Truth (TV Series) · as Lee Ah-Jin |
| 2022 | Adamas (TV Series) · as Secretary Yoon |
| 2022 | Boogie Nights · as Yeon-Ju |
| 2021 | Uncle (2021) (TV Series) · as Song Hwa-Eum |
| 2021 | Emergency Declaration · as In-Seon |
| 2020 | Okay Madam · as Flight Passenger |
| 2020 | Tell Me What You Saw (TV Series) · as Han Yi-Soo |
| 2019 | When the Camellia Blooms (TV Series) · as Mi-Yeon |
| 2019 | I Wanna Hear Your Song (TV Series) · as Hong Soo-Young |
| 2019 | |
| 2019 | Birth of an Employee - Good People (TV Series) |
| 2018 | Memories of the Alhambra (TV Series) · as Lee Soo-Jin |
| 2018 | Suits (KR) (TV Series) · as Se-Hee |
| 2017 | Drama Stage (TV Series) · as Mi-Young |
| 2017 | Black (TV Series) · as Ha-Ram's Mother (young) |
| 2017 | V.I.P. · as Female Agent #1 |
| 2016 | Beautiful Mind (TV Series) · as Lee Shi-Hyun |
| 2016 | Puck! (TV Series) · as Ga Yeo-Eun |
| 2015 | Beautiful You (TV Series) · as Kim Soo-Jin |
| 2015 | Mrs. Cop (TV Series) · as Kang Ji-Yeon |
| 2015 | Who Are You: School 2015 (TV Series) · as Jung Min-Young |
| 2014 | Run, Jang Mi (TV Series) · as Hwang Tae-Hee |
| 2014 | Dr. Frost (TV Series) · as Song Sul |
| 2014 | Misaeng (TV Series) · as Ha Jung-Yeon |
| 2014 | Tunnel · as Yoo-Kyung |
| 2014 | God's Gift: 14 Days (TV Series) · as Lee Soo-Jung |
| 2013 | 10 Minutes · as Song Eun-Hye |
| 2013 | Tinker Ticker · as Si-Won |
| 2023 | The Devil's Plan (TV Series) · as Self - Contestant |