So far an estimated 51 different nationalities (by birthplace and including Scotland) have played for Celtic (depending on what you count as a country, or whether you accept those who played for several national teams!). The list below excludes Scottish players as there are too many, and also includes some who never made a first team performance. It is also incomplete so please do add anyone you spot as missing or rectify any other errors!.
Players in italics did not (or are yet to) make a competitive first team appearance.
[needs updating…]
Albania
Rudi Vata 1992-96
Argentina
Alexandro Bernabei
Australia
Scott McDonald 2007-10
Mark Viduka 1998-2000
Dan Lavery 1948-49
Tom Rogic
Danny Milosevic 2004
Willie Hastie 1989-1991
Jackson Irvine
Aaron Mooy
Belgium
Joos Valgaeren 2000-05
Dedryck Boyata
Logan Bailly
Bosnia and Herzegovina
Bahrudin Atajic* Also eligible for Sweden
Brazil
Juninho Paulista 2004-05
Rafael Scheidt 1999-2000
Bulgaria
Stiliyan Petrov 1999-2006
Aleksander Tonev
Jason Denayer
Tomislav Pavlov 2007-09
Cameroon
Jean-Joel Perrier-Doumbe 2007-09
Landry N’Guemo 2009 -10 (on loan from AS Nancy)
Canada
Joe Kennaway 1931-39
Simon Lynch 1999-2003 *Played international football for Scotland B
Jacob Lensky 2005-07 *Played international football for Czech Republic U21
Scott Fergusson 1992-93
Costa Rica
Cristian Gamboa
Croatia
Jozo Simunovic
China
Du Wei 2005-06
Zheng Zhi 2009-10
Czechia / Czech Rep
Jiri Jarosik 2006-2008
Filip Twardzik
Milan Misun
Patrik Twardzik
Denmark
Morten Rasmussen 2010-12
Thomas Gravesen 2006-08
Ulrik Laursen 2002-05
Morten Wieghorst 1995-2002
Marc Rieper 1997-2000
Erik Sviatchenko
Bent Martin 1966
Leif Nielsen 1972
England
Lee Naylor 2006-10
Alan Thompson 2000-07
Chris Sutton 2000-06
Dion Dublin 2006
Adam Virgo 2005-06
Michael Gray 2003-04 (on loan from Sunderland)
Steve Guppy 2001-04
Alan Stubbs 1996-2001
Lee Martin 1994-96
Paul Elliot 1989-1994
Carl Muggleton 1993-94
Wayne Biggins 1993-94
Stuart Slater 1992-93
Martin Hayes1990-92
Tony Mowbray 1991-95
Peter Latchford 1975-87
Ben Hutchinson
Tony Warner 1998 (on loan from Liverpool) *Played international football for Trinidad and Tobago
Tom Maley 1888-91(born in Portsmouth)
Jim Welford 1897-1900
John ‘Jack’ Reynolds 1897-98
Ebenezer Owers 1914
John McAlindon 1948-57
Roy Baines 1976-79
Tom Barber 1918
George Elliott 1918
Danny Fox 2009-10 *Played international football for Scotland
Josh Thompson 2009 –
Gary Hooper 2010 –
Jon Gould 1997-2003 *Played international football for Scotland
Barry Elliot 1995-2000 *Played international football for Scotland U21
Ian Wright 1999-2000
Andy Payton 1992-93
Tommy Johnson 1997-2001
Fraser Forster 2010- (on loan from Newcastle United)
Kelvin Wilson
Andre Blackman
Scott Sinclair
Patrick Roberts
Darnell Fisher
Carlton Cole
Kevin Pilkington 1998 (on loan from Manchester United)
Matty Hughes
Curtis Jones
Michael Ordish
John Marsden
Danny Gardner 2009
Nathan Taylor 2009
Paul Hutchinson 2003-06
Craig Culkin 1995-1998 *Played (non-FIFA) international football for Jersey
Kevin Gilligan 1995-1997 *Played (non-FIFA) international football for Guernsey
Troy Douglin 2000-01 (on loan from Torquay)
James Gilpin 2006-07 *Played international football for Scotland U16s
Laurence Gaughan 2007-09 *Played international football for the Republic of Ireland U19s
Kirk Hudson 2004-06
Michael Jago 2000-01
Joe Hart
Finland
Teemu Pukki
France
Stephane Mahe 1997-2001
Didier Agathe 2000-06
Jeremie Aliadiere 2005 (on loan from Arsenal)
Diomansy Kamara 2010 (on loan from Fulham) *Played international football for Senegal
Steven Moukoyolo
Moussa Dembele
Stephane Bonnes 1999-2003
Michael Herbet 2001-03
French Guiana
Marc Antoine Fortune 2009-10
Germany
Andreas Hinkel 2008-2011
Andreas Thom 1995-98
Neil Watt 1979-1980
Ghana
Mubarak Wakaso
Greece
Georgios Samaras 2008-
Georgios Giakoumakis
Guinea
Dianbobo Balde 2001-2009
Mo Camara 2005-06
Guinea-Bissau
Amido Balde* also eligible for Portugal
Honduras
Emilio Izaguirre
Luis Palma
Iceland
Teddy Bjarnason 2004-08
Johannes Edvaldsson 1975-80
Kjartan Finnbogason 2004 – 2007
Holmbert Fridjonsson
India
Mohammed Salim 1936
Iran
Daniel Arzani 2018-2019
Ireland (Northern)
Patrick McCourt 2008-
Niall McGinn 2009-
Neil Lennon 2000-07
Allen McKnight 1986-88
Anton Rogan 1986-1991
Bertie Peacock 1949-1961
Charlie Tully 1948-1959
Willie Maley 1888-1897
John Convery 1997-2002
Michael McGovern 2001-08
Brian Vaugh 1995-99
Gerry Crossley 1995-99 *Played international football for the Republic of Ireland
Andy Kilmartin 1999-2001 *Played international football for the Republic of Ireland U16s
Danny Lafferty 2005-10
Gerry Lyttle 1995-98
Deaglan Bunting 2007-
Paul George 2008-
Ireland (Republic)
Daryl Murphy 2010-
Anthony Stokes 2010-
Cillian Sheridan 2006-10
O’Brien, James 2005-08
Graham Carey 2005-
Darren O’Dea 2005-
Aiden McGeady 2004-10
Roy Keane 2006
Paul Byrne 1993-95
Packie Bonner 1978-95
Tommy Coyne 1988-93
Tony Cascarino 1991-92
Chris Morris 1987-92
Sean Fallon 1950-58
Peter Kavanagh 1929-32
Patsy Gallacher 1911-26
Colin Healy 1998 – 2003
Pierce O’Leary 1985 – 87
Eoghan O’Connell
Charlie Gallacher 1959-68
Paddy Turner 1963-64
Mick McCarthy 1987-89
Joe Haverty 1964-65
James Foley 1934-36
Liam Miller 1997-2004
Robbie Keane 2010 (on loan from Tottenham)
Jim Goodwin 1997-2002
Peter Davis 1995-97
Declan Boyle 1994-97
Tom Lally 1970-71
Sean Boggins 1950
Paul Cahillane 2005-08
Gary Christie 2003-06
Mike Doyle 1999-2003
Simon Dunne 2006
Gary Dunphy 2004-05
Paddy Fitzpatrick 1996-98
Eric Foley 2006-09
Shay Given 1992-94
James Gallagher 1996-2000
Declan Roche 1987-1991
Tim Kiely 2005-07
Richie Towell 2008-
Diarmuid O’Carroll 2003-07
Tommy McEntegart 1985-87
Michael Duffy
Bosun Lawal
Israel
Eyal Berkovic 1999-2001
Nir Bitton 2013-Present
Beram Kayal 2010-15
Hatem Abd El-Hamed 2019-21
Liel Abada
Italy
Massimo Donati 2007-09
Enrico Annoni 1997-99
Paulo Di Canio 1996-97
Rolando Ugolini 1944-48
Luca Santonocito 2007-10
Alessandro Sanna 1998-2000
Marco Cortani 1998-2000
Daniele Giordano 2008-Leo Fasan
Ivory Coast
Olivier Tebily 1999-2002
Momo Sylla 2001-2005 *Played international football for Guinea
Jamaica
Gil Heron 1951-52
Japan
Koki Mizuno 2008-10
Shunsuke Nakamura 2005-2009
Kyogo Furahashi
Ideguchi Yosuke
Reo Hatate
Kenya
Victor Wanyama 2011-
Latvia
Antons Kurakins 2008-
Krisjanis Vallers 2008-10
Malaysia
Shaun Maloney 2001-07, 2008- *Played international football for Scotland
Mexico
Efrain Juarez 2010-
Morocco
Badr El Kaddouri
Mozambique
Jorge Cadete 1996-97 – the first African ‘Bhoy’? Played international football for Portugal.
Netherlands
Jan Venegoor of Hesselink 2006-09
Evander Sno 2006-08
Bobby Petta 1999-2004
Pierre Van Hooijdonk 1995-97
Glenn Loovens 2008-
Jos Hooiveld 2010-
Derk Boerrigter
Virgil Van Dijk
Dorus de Vries
New Zealand
Chris Killen 2007-10
Micheal McGlinchey 2005 -09
Nigeria
Rabiu Ibrahim
Efe Ambrose
Norway
Thomas Rogne 2010-
Vidar Riseth 1998-2000
Harald Brattbakk 1997-2000
Stefan Johansen 22014-
Jo Inge Berget
Kristoffer Ajer
Geir Karlsen (Trialist 1972)
Poland
Artur Boruc 2005-10
Majiec Zurawski 2005-08
Dariusz Wdowczyk 1989-94
Dariusz Dziekanowski 1989-92
Konrad Kapler 1947-49
Pawel Brozek
Lukasz Zaluska 2009-
Portugal
Jorge Cadete
Jota
Romania
Richard Filaret 2007
Russia
Dmitri Kharine 1999-2002
Senegal
Henri Camara 2005 (on loan from Wolverhampton Wanderers)
Serbia
Stefan Scepovic
Sierra Leone
Mohamed Bangura
Slovakia
Lubomir Moravcik 1998-2002
Stanislav Varga 2003-06
Somalia
Islam Feruz 2008 *Played international football for Scotland U17s
South Korea
Cha Du-Ri
Ki Sung-Yong
Oh Hyeon-gyu
Spain
Javier Sanchez Broto 2003
David Fernandez 2002-03
Marc Crosas 2008-11
Suriname
Regi Blinker 1997-2000 *Played international football for the Netherlands
Edson Braafheid 2010 (on loan from Bayern Munich) *Played international football for the Netherlands
Sweden
Magnus Hedman 2002-05
Henrik Larsson 1997-2004
Johann Mjallby 1998-2004
Daniel Majstorovic 2010-
Freddie Ljungberg 2010-11
Bahrudin Atajic* Also eligible for Bosnia
Mikael Lustig
John Guidetti
Carl Starfelt
Gustaf Lagerbielke
Switzerland
Stephane Henchoz 2005 (on loan from Liverpool)
Ramon Vega 2000-01 (on loan from Spurs)
Saidy Janko
Tunisia
Lassad Nouioui
Turkey
Colin Kazim-Richards
Nadir Ciftci
USA
John Blackwood 1899
John Donoghue, 1926
Cameron Carter-Vickers, 2022- Present
Julius Hjulian, 1925-26
Dominic Cervi 2009-
Venezuela
Fernando de Ornelas 1997
Wales
Joe Ledley 2010-
John Hartson 2001-06
Craig Bellamy 2005 (on loan from Newcastle)
Leigh Roose 1910 – Leigh was tragically killed in WW1
Adam Matthews 2011-
Owen Jones 2005-07