Cillian Sheridan (born 23 February 1989) is an Irish professional footballer who plays as a forward for Highland League club Brechin City.

In 2023 he signed a short term deal with Inverness Caledonian Thistle until early 2024, and spent the remainder of the season with Queen's Park where he enjoyed a return to form.

[4] During his time at Belvedere, Sheridan chose to focus on his football career, having turned down an offer to join Australian rules club Brisbane Lions.

[7] He made his first team debut for Celtic in the Scottish Cup quarter-finals against Inverness Caledonian Thistle on 25 February 2007, as a 73rd-minute substitute for Mark Wilson in a 2–1 away victory.

[10] Sheridan made his European debut on 21 October 2008, coming on as a substitute for Scott McDonald in Celtic's Champions League game against Manchester United at Old Trafford.

[15] He made his first start and league debut a week later on Valentine's Day in Motherwell's 1–0 win over Hamilton, playing the entire 90 minutes as his strike partner David Clarkson scored the only goal of the game.

[33][34] On 8 July, Sheridan joined SPL club Hibernian on trial,[30] but instead decided to return to St Johnstone on a loan deal until January 2012.

[39] After being released by CSKA Sofia, due to the club's financial problems, Sheridan signed a two-year contract with Scottish Premier League side Kilmarnock on 6 September 2012.

[48][49] He made his official debut on 17 August 2013 against Apollon Limassol in the Cypriot Super Cup final, in a match which APOEL won 1–0 and lifted the trophy.

[55] On 21 May 2014, Sheridan scored APOEL's second goal in the Cypriot Cup final against Ermis Aradippou and helped his team to lift the trophy after a 2–0 win.

[58][59] On 30 July 2014, Sheridan scored the equalizer against HJK Helsinki at Sonera Stadium, in APOEL's 2–2 first leg draw for the third qualifying round of the UEFA Champions League.

[63] On 25 May 2015, one day after winning his second consecutive double with APOEL, the team announced that Sheridan was leaving the club as his contract would not be renewed.

[65] He made his debut on 9 July in the second leg of the Europa League first round qualifying tie against Dinamo Batumi, helping his side to a 2–1 aggregate win.

[67] He then scored two penalties on 6 August in a 2–2 draw with Brøndby in the Europa League third qualifying round second leg, but his team were eliminated on away goals.

He levelled the match at 1–1 after 20 minutes, then helped his side come back from 3–1 down to win 5–3, scoring Omonia's fifth goal from the penalty spot in injury time.

[80] On 8 February 2023, Sheridan would suffer yet more injury heartbreak, as his other Achilles tendon ruptured during a Challenge Cup game against Raith Rovers.

[83] On 26 October 2023, Sheridan signed for Scottish Championship club Inverness Caledonian Thistle on a short-term contract until January 2024.

[90] Sheridan enjoyed a small career renaissance with the Spiders through a link-up with fellow Irishman Ruari Paton that was a big factor in the club confirming their Championship status at the end of the season.

[101] On 25 May 2010, Sheridan won his first cap for the Republic of Ireland in a 2–1 friendly win against Paraguay at the RDS Arena, as a 62nd-minute substitute for Robbie Keane.

[103] His final of three caps was his only start, playing 56 minutes of a 1–0 defeat to Argentina at the Aviva Stadium on 11 August before being withdrawn for Andy Keogh.