|Full name||Giorgos Merkis|
|Date of birth||30 July 1984|
|Place of birth||Limassol, Cyprus|
|Height||1.88 m (6 ft 2 in)|
|Playing position||Centre back|
|* Senior club appearances and goals counted for the domestic league only and correct as of 20 February 2017.
‡ National team caps and goals correct as of 25 May 2016
Merkis is a product of Apollon Limassol academies, making his first team debut during 2001–02 season at the age of 17. He spent the vast majority of his career with Apollon, where he managed to win one championship, two cups and one super cup. After fifteen years at the club, his contract was mutually terminated on 12 January 2016.
On 12 January 2016, Merkis signed an 18-month contract with fellow Cypriot First Division club APOEL. He made his official debut on 17 January 2016, coming on as a 69th-minute substitute in APOEL's 3–0 home win against Enosis Neon Paralimni for the Cypriot First Division. He scored his first goal for APOEL against his former team Apollon Limassol on 2 April 2016, netting a late equalizer in his team's 2–2 home draw for the Cypriot First Division Championship play-offs. A few months after joining APOEL, he crowned champion as his team managed to win the Cypriot First Division title for a fourth time in the row.
Merkis made his international debut with Cyprus National Team on 1 March 2006, in friendly match against Armenia at Tsirion Stadium, coming on as a 79th-minute substitute in Cyprus' 2–0 win. He scored his first goal on 16 November 2014, netting the opening goal in Cyprus' 5–0 home victory against Andorra for the UEFA Euro 2016 qualifiers.
- Λύση συνεργασίας με Γιώργο Μερκή (in Greek). apollon.com.cy. 12 January 2016. Retrieved 12 January 2016.
- Σύναψη συμφωνίας με Γιώργο Μερκή (in Greek). apoelfc.com.cy. 12 January 2016. Retrieved 12 January 2016.
- APOEL FC 3-0 E.N.P.. apoelfc.com.cy. 17 January 2016. Retrieved 17 January 2016.
- APOEL FC 2-2 Apollon Limassol. apoelfc.com.cy. 2 April 2016. Retrieved 2 April 2016.
- "APOEL clinch record 25th title in Cyprus". uefa.com. 28 April 2016. Retrieved 28 April 2016.
- "APOEL vs. AEK Larnaca 2 - 0". Soccerway. 28 April 2016. Retrieved 28 April 2016.
- Cyprus vs. Andorra 5 - 0. soccerway. 16 November 2014. Retrieved 16 November 2014.