{{Infoboks fodboldbiografi
 | name           = Ólafur Kristjánsson
 | image                =
 | fullname = Ólafur Helgi Kristjánsson
 | height               = 183 cm
 | birth_date          = {{birth date and age|df=yes|1968|5|20}}
| birth_place = [[Reykjavík]], [[Island]]
 | currentclub          = [[Esbjerg fB]]
 | clubnumber           = Manager
 | position             = Forsvar
 | youthyears1   = 1979–1984 | youthclubs1   = [[Fimleikafélag Hafnarfjarðar|FH Hafnarfjörður]]
 | years1   = 1985–1995 | clubs1   = [[Fimleikafélag Hafnarfjarðar|FH Hafnarfjörður]] | caps1   = 149 | goals1   = 9
 | years2   = 1996–1997 | clubs2   = [[Knattspyrnufélag Reykjavíkur|KR Reykjavík]] | caps2   = 30 | goals2   = 0
 | years3   = 1997–2001 | clubs3   = [[AGF Fodbold|AGF]] | caps3   = 65 | goals3   = 1
 | totalcaps = 234 | totalgoals = 10
 | nationalyears1   = 1985 | nationalteam1   = [[Islands U/19-fodboldlandshold|Island U/19]] | nationalcaps1   = 5 | nationalgoals1   = 0
 | nationalyears2   = 1988–1989 | nationalteam2   = [[Islands U/21-fodboldlandshold|Island U/21]] | nationalcaps2   = 7 | nationalgoals2   = 0
 | nationalyears3   = 1990–1996 | nationalteam3   = [[Islands fodboldlandshold|Island]] | nationalcaps3   = 14 | nationalgoals3   = 0
 | manageryears1 = 2002–2004 | managerclubs1 = [[AGF Fodbold|AGF]] (assistent)
 | manageryears2 = 2004–2005 | managerclubs2 = [[Knattspyrnufélagið Fram|Fram Reykjavík]]
 | manageryears3 = 2006–2014 | managerclubs3 = [[Breiðablik UBK]]
 | manageryears4 = 2014–2015 | managerclubs4 = [[FC Nordsjælland]]
 | manageryears5 = 2016–2017 | managerclubs5 = [[Randers FC]]
 | manageryears6 = 2018–2020 | managerclubs6 = [[Fimleikafélag Hafnarfjarðar|FH Hafnarfjörður]]
 | manageryears7 = 2020– | managerclubs7 = [[Esbjerg fB]]
}}
'''Ólafur Helgi Kristjánsson''' (født [[20. maj]] [[1968]]) er en tidligere [[island]]sk [[fodboldspiller]] og nuværende cheftræner i den danske klub [[Esbjerg fB]]. Han har tidligere blandt andet trænet [[FC Nordsjælland]] fra 2014 til 2015,<ref>{{cite web|url=http://www.uefa.com/memberassociations/association=isl/news/newsid=2095444.html|title=Breidablik's Kristjánsson excited by Nordsjælland|publisher=uefa.com|accessdate=18. maj 2014}}</ref> og [[Randers FC]] fra sommeren 2016<ref>{{cite web | url = http://www.randersfc.dk/?side=10635 | title = Ólafur Kristjánsson bliver ny cheftræner i Randers FC | publisher = Randers FC | date = 2016-05-23 | first = Ib | last = Rasmussen | accessdate = 2016-06-28 }}</ref> til og med [[5. oktober]] [[2017]].<ref>[http://www.bold.dk/fodbold/nyheder/olafur-kristjansson-faerdig-i-randers/ Olafur Kristjansson færdig i Randers]</ref>
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