{{Infoboks fodboldbiografi
| spillernavn = Gary O'Neil
| billede = GaryO'NeilWHU.jpg
| billede_størrelse = 250px
| fuldenavn = Gary Paul O'Neil
| fødselsdato = {{Dato og alder|1983|5|18}}
| fødeby = [[London]]
| fødeland = [[England]], [[Storbritannien]]
| dødsdato = 
| dødsland = 
| højde = 173 cm
| position = [[Midtbanespiller (fodbold)|Midtbanespiller]]
| nuværendeklub = [[Wolverhampton Wanderers F.C.|Wolverhampton Wanderers]] (træner)
| youthyears1 = 
| youthclubs1 = [[Portsmouth F.C.|Portsmouth]]
| years1 = 2000–2007
| clubs1 = [[Portsmouth F.C.|Portsmouth]]
| caps1 = 174
| goals1 = 16
| years2 = 2003
| clubs2 = → [[Walsall F.C.|Walsall]] (leje)
| caps2 = 7
| goals2 = 0
| years3 = 2004
| clubs3 = → [[Cardiff City F.C.|Cardiff City]] (leje)
| caps3 = 9
| goals3 = 1
| years4 = 2007–2011
| clubs4 = [[Middlesbrough F.C.|Middlesbrough]]
| caps4 = 109
| goals4 = 8
| years5 = 2011–2013
| clubs5 = [[West Ham United F.C.|West Ham United]]
| caps5 = 48
| goals5 = 3
| years6 = 2013–2014
| clubs6 = [[Queens Park Rangers F.C.|Queens Park Rangers]]
| caps6 = 29
| goals6 = 1
| years7 = 2014–2016
| clubs7 = [[Norwich City F.C.|Norwich City]]
| caps7 = 51
| goals7 = 0
| years8 = 2016–2018
| clubs8 = [[Bristol City F.C.|Bristol City]]
| caps8 = 33
| goals8 = 1
| nationalyears1 = 2001–2002
| nationalteam1 = {{fhold|England|19}}
| nationalcaps1 = 8
| nationalgoals1 = 0
| manageryears1 = 2022–2023
| managerclubs1 = [[A.F.C. Bournemouth|Bournemouth]]
| caption = O'Neil med West Ham i 2012
| clubs9 = [[Bolton Wanderers F.C.|Bolton Wanderers]]
| years9 = 2018–2019
| caps9 = 29
| goals9 = 3
| nationalteam2 = {{fhold|England|20}}
| nationalyears2 = 2002–2003
| nationalcaps2 = 7
| nationalgoals2 = 0
| nationalteam3 = {{fhold|England|21}}
| nationalyears3 = 2003–2004
| nationalcaps3 = 9
| nationalgoals3 = 0
| managerclubs2 = [[Wolverhampton Wanderers F.C.|Wolverhampton Wanderers]]
| manageryears2 = 2023–
}}
Levende_personer