Aristeidis Grigoriadis
{{Infobox Swimmer| | swimmername=Aris Grigoriadis | image= | imagesize= | caption = | fullname = Aristeidis Grigoriadis | nicknames = | nationality = Greece | strokes = Freestyle, Backstroke | club = Aris Thessaloniki | collegeteam = | birthdate = December 6, 1985 | birthplace = Thessaloniki, Greece | deathdate = | deathplace = | height = 1.94 m (6 ft 4+1⁄2 in) | weight = [convert: needs a number] | medaltemplates=
|- ! colspan="3" style="text-align:center;vertical-align:middle;background-color:#eeeeee;color:inherit;" | Men's swimming
|- ! colspan="3" style="text-align:center;vertical-align:middle;background-color:#eeeeee;color:inherit;" class="adr" | Representing Greece
|- ! colspan="3" style="text-align:center;vertical-align:middle;background-color:#cccccc;color:inherit;" | [[[World Aquatics Championships|World Championships]]
|- | style="text-align:center;vertical-align:middle;color:inherit;" | || style="text-align:center;vertical-align:middle;" | 2005 Montreal || style="text-align:center;vertical-align:middle;" | 50 m Backstroke
|- ! colspan="3" style="text-align:center;vertical-align:middle;background-color:#cccccc;color:inherit;" | European Championships (LC)
|- | style="text-align:center;vertical-align:middle;color:inherit;" | || style="text-align:center;vertical-align:middle;" | 2008 Eindhoven || style="text-align:center;vertical-align:middle;" | 50 m Backstroke
|- | style="text-align:center;vertical-align:middle;color:inherit;" | || style="text-align:center;vertical-align:middle;" | 2008 Eindhoven || style="text-align:center;vertical-align:middle;" | 100 m Backstroke
|- ! colspan="3" style="text-align:center;vertical-align:middle;background-color:#cccccc;color:inherit;" | European Championships (SC)
|- | style="text-align:center;vertical-align:middle;color:inherit;" | || style="text-align:center;vertical-align:middle;" | 2006 Budapest || style="text-align:center;vertical-align:middle;" | 50 m Backstroke
|- | style="text-align:center;vertical-align:middle;color:inherit;" | || style="text-align:center;vertical-align:middle;" | 2006 Budapest || style="text-align:center;vertical-align:middle;" | 100 m Backstroke Aristeidis (Aris) Grigoriadis (born December 6, 1985) is a Greek swimmer from [[Thessaloniki. He became the first - and only one so far - Greek swimmer to be crowned World Champion in the 50m backstroke event of the World Aquatics Championships 2005 in Montreal.