| Nama Lengkap | Oh Man-seok (???) |
| Tempat Lahir | Gwangju, Gyeonggi, Korea Selatan |
| Tanggal Lahir | 30 Januari 1975 |
| Kebangsaan | Korea Selatan |
| Pekerjaan | Aktor, Aktor Teater Musikal, Pembawa Acara |
| Tahun Aktif | 1999-sekarang |
| Agensi | HB Entertainment |
| Pendidikan | Universitas Seni Nasional Korea – Jurusan Teater |
| Tinggi Badan | 175 cm |
| Berat Badan | 68 kg |
| Golongan Darah | B |
| Pasangan | Jo Sang-gyeong (menikah 2006, cerai 2007) Wanita non-selebriti (menikah 2018) |
| Anak | 1 putri dari pernikahan pertama, 1 putri dari pernikahan kedua |
| Debut | 1999 (Drama panggung "Faust") |
| Penghargaan Pilihan: | |
| 2006 KBS Drama Awards: Excellence Award, Actor (The Vineyard Man) | |
| 2007 1st The Musical Awards: Best Actor (Finding Kim Jong-wook) | |
| 2007 13th Korea Musical Awards: Best Actor (Finding Kim Jong-wook) | |
| 2013 7th The Musical Awards: Best Actor (The Days) | |
| 2014 8th The Musical Awards: Best Actor (The Days) | |
| 2021 KBS Drama Awards: Best Supporting Actor (Youth of May) | |
| Drama TV Pilihan: | |
| The Vineyard Man (KBS2, 2006) | |
| King and I (SBS, 2007) | |
| The Great King, Sejong (KBS1, 2008) | |
| Jumong (MBC, 2006) - cameo | |
| What's Up! (MBN, 2011) | |
| The Master's Sun (SBS, 2013) | |
| Vampire Detective (OCN, 2016) | |
| Money Flower (MBC, 2017) | |
| Partners for Justice (MBC, 2018) | |
| Partners for Justice 2 (MBC, 2019) | |
| Crash Landing on You (tvN, 2019-2020) | |
| Youth of May (KBS2, 2021) | |
| Law School (JTBC, 2021) | |
| The Good Detective 2 (JTBC, 2022) | |
| Durian's Affair (TV Chosun, 2023) | |
| Film Pilihan: | |
| Tale of Cinema (2006) | |
| Soo (2007) | |
| Our Town (2007) | |
| The Righteous Thief (2009) | |
| One Day (2017) | |
| The Box (2021) | |
| Musikal Pilihan: | |
| Hedwig and the Angry Inch | |
| Finding Kim Jong-wook | |
| The Days | |
| Gwanghwamun Sonata | |
| Frankenstein | |
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