|Full name||Georgios Katsikas|
|Date of birth||14 June 1990|
|Place of birth||Thessaloniki, Greece|
|Height||1.87 m (6 ft 1 1⁄2 in)|
|Playing position||Centre back|
|2008–2009||→ Olympiakos Volou (loan)||19||(1)|
|2016–2017||Jong FC Twente||4||(1)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 22:16, 19 March 2017 (UTC).
In the summer of 2008 he was loaned out to Olympiakos Volos, then playing in Beta Ethniki, to gain first team experience. He debuted for Olympiakos Volos in the opening game of the 2008-09 season, a 0-0 away draw against Pierikos. He even managed to score for Olympiakos Volos, to help the club grab an 1-1 home draw against Veria. Until the end of the season he totally featured in 19 matches not managing to score any other goals. After his loan spell in Volos Katsikas returned to Iraklis for the 2009-10 season. He could not break into the starting lineup, but nevertheless he made his debut for Iraklis in a cup against Gamma Ethniki side Trikala. Katsikas was sent off in his debut and eventually Iraklis got eliminated by the Cup after losing the contest by a 1-0 scoreline. In that season he also made his league debut for Iraklis, as he came in for teammate Achilleas Sarakatsanos in the 84th minute, in a 2-0 away defeat from Panathinaikos. In his second season for Iraklis Katsikas featured regularly in the playing squad of the club, playing in 13 of the club's league matches until February. On 9 February 2011 Katsikas suffered a torn cruciate ligament, in a friendly match of Greece U-21, and lost the remainder of the season.
On 14 October 2011 Katsikas signed a four years contract with PAOK, after he was released from Iraklis. On 4 January 2012 he made his debut for the club in 3-1 home win against Levadiakos. He scored his first goal for PAOK against Rapid Wien in August 2012, while his first league goal came into the local derby between PAOK and Aris in a 4-1 win for PAOK. On April 3, 2015 George Katsikas along with Fanis Tzandaris have solved their contracts with PAOK, receiving his payment till the end of the season.
On 2 July 2015, Katsikas signed a year contract with the Dutch club Twente for an undisclosed fee. Twente coach Alfred Schreuder was pleased with this transfer as he could build on Katsikas' experience. On 9 September 2015 in the training, Katsikas has suffered a cruciate ligament rupture and he is going to undergo a surgery which makes him miss the remainder of the season. The Greek centre back is expected to stay on the sidelines for six to nine months missing potentially the start of Twente's pre-season over the summer 2016. On 21 August, Katsikas made his comeback in the awaygame against FC Groningen. 
- "Giorgos Katsikas profile". Iraklis FC Official site. Retrieved 2009-07-07.
- Γιώργος Κατσικάς: Γέννημα-θρέμμα Ηρακλής (in Greek). Bluearena.gr. 13 December 2010. Retrieved 10 February 2011.
- Παναθηναϊκός-Ηρακλής 2-0 (in Greek). Contra.gr. 11 April 2010. Retrieved 10 February 2011.
- Ρήξη χιαστού ο Κατσικάς, χάνει το υπόλοιπο της σεζόν (in Greek). Contra.gr. 10 February 2011. Retrieved 10 February 2011.
- Σοκ με Κατσικά-Χάνει τη σεζόν (in Greek). Bluearena.gr. 10 February 2011. Retrieved 10 February 2011.
- Εξι μήνες (τουλάχιστον) εκτός ο Γιώργος Κατσικάς (in Greek). Iraklis F.C. Official site. 10 February 2011. Archived from the original on 21 July 2011. Retrieved 10 February 2011.
- "PAOK FC signs Katsikas". paokfc.gr. Archived from the original on 27 May 2012. Retrieved 14 October 2011.
- "Τέλος Τζανδάρης και Κατσικάς". sport24.gr. 3 April 2015.
- "Και επισήμως στην Τβέντε ο Κατσικάς". www.sport24.gr. 2 July 2015.
- "FC Twente vangt vertrek Bjelland op met Katsikas". www.vi.nl. 2 July 2015.
- "Τραυματισμός-σοκ για Κατσικά!". www.onsports.gr. 10 September 2015.
- Græsk midterforsvarer fra TC Twente til EfB‚ efb.dk, 23 January 2017
- "Match Report Greece Syria 4-0" (PDF). pescara2009.it. 27 June 2009. Retrieved 10 February 2011.
- "Match Report Italy Greece 3-1" (PDF). pescara2009.it. 29 June 2009. Retrieved 10 February 2011.
- "Match Report Greece Turkey 1-1" (PDF). pescara2009.it. 3 July 2009. Retrieved 10 February 2011.
- Giorgos Katsikas at the official page of Iraklis Thessaloniki FC