| Roman Častulín | |
| Fullname: | Roman Častulín |
| Birth Date: | 3 April 1985 |
| Birth Place: | Trenčín, Czechoslovakia[1] |
| Currentclub: | FK Dubnica |
| Clubnumber: | 19 |
| Position: | Centre back |
| Youthclubs1: | TTS Trenčín |
| Youthclubs2: | Trenčín |
| Years1: | 2003–2004 |
| Clubs1: | Trenčín |
| Years2: | 2004–2005 |
| Clubs2: | TTS Trenčín |
| Years3: | 2004–2005 |
| Clubs3: | → Nemšová (loan) |
| Years4: | 2005–2011 |
| Years5: | 2005 |
| Clubs5: | → TTS Trenčín (loan) |
| Years6: | 2011–2015 |
| Clubs6: | Myjava |
| Caps6: | 108 |
| Goals6: | 5 |
| Years7: | 2015–2017 |
| Clubs7: | Nová Dubnica |
| Years8: | 2016 |
| Clubs8: | → Spartak Trnava II (loan) |
| Caps9: | 5 |
| Goals9: | 0 |
| Years9: | 2017 |
| Clubs9: | → Dubnica (loan) |
| Years10: | 2017– |
| Caps10: | 17 |
| Goals10: | 0 |
| Club-Update: | 25 February 2018 |
Roman Častulín (born 3 April 1985) is a Slovak footballer who plays as a centre back for FK Dubnica.
He made his Corgoň Liga debut for Spartak Myjava against MŠK Žilina on 13 July 2012. He also scored the first Spartak Myjava Corgoň Liga goal in the 87th minute of the match, which ended in a 1–4 loss against MŠK Žilina.