|Date of birth||2 July 1993|
|Place of birth||Aryanah, Tunisia|
|Height||1.88 m (6 ft 2 in)|
* Senior club appearances and goals counted for the domestic league only and correct as of 16 November 2018|
‡ National team caps and goals correct as of 21 October 2018
Mariah was formed in AS Ariana, the team that was active in the Tunisian Ligue Professionnelle 2. In the 2013–14 season, he was transferred to ES Métlaoui when he was 20 years old. After spending two seasons with the team, he was prominently featured and invited to the Tunisian Olympic team. He attracted the attention of the officials of CS Sfaxien, one of the most important teams in the Tunisian Ligue Professionnelle 1 who sought to sign with him, starting from the 2014–15 season. Since his first season with CS Sfaxien, Yassin Meriah has been a key figure in the squad and has managed to play in many of the team's defensive positions.
On 28 July 2018, Meriah joined Olympiacos for an estimated transfer fee of €1,500,000, signing a four-year contract. On 2 September 2018, he scored his first goal for the club in an emphatic 5-0 home win against PAS Giannina. 
In May 2018 he was named in Tunisia's preliminary 29 man squad for the 2018 FIFA World Cup in Russia. Tunisia may have only picked up the one 2-1 victory over Panama (in which Meriah netted an unfortunate own goal), but Meriah used the competition as a showcase for his talents by playing every single minute of the Tunisian campaign. 
- As of 16 November 2018
- Scores and results list Tunisia's goal tally first.
|1.||1 September 2017||Stade 7 November, Radès, Tunisia||DR Congo||1–0||2–1||2018 FIFA World Cup qualification|
|2.||13 October 2018||Stade 7 November, Radès, Tunisia||Niger||1–0||1–0||2019 Africa Cup of Nations qualification|
- "2018 FIFA World Cup: List of players" (PDF). FIFA. 14 July 2018. p. 31.
- "Aνακοίνωσε τον Μεριά ο Ολυμπιακός" (in Greek). Retrieved 2018-07-28.
- "Ολυμπιακός - ΠΑΣ Γιάννινα 5-0" (in Greek). Retrieved 2018-09-02.
- "Revealed: Every World Cup 2018 squad – 23-man & preliminary lists & when will they be announced? | Goal.com". Retrieved 23 May 2018.
- Okeleji, Oluwashina (2 June 2018). "Tunisia World Cup squad: Leicester City's Benalouane in 23-man squad". BBC Sport. Retrieved 1 August 2018.
- "Yassine Meriah". National Football Teams. Benjamin Strack-Zimmerman. Retrieved 13 October 2018.
- "Meriah, Yassine". National Football Teams. Retrieved 2 September 2017.
- Yassine Meriah at Soccerway
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