Kolbeinn Sigþórsson, Icelandic footballer
Kolbeinn Sigþórsson (Icelandic pronunciation: ​[ˈkʰɔlpei̯tn̥ ˈsɪxθou̯r̥sɔn]; born 14 March 1990) is an Icelandic professional footballer who plays as a striker. Currently a free agent, he most recently played for Allsvenskan club IFK Göteborg.

Before being signed by Ajax for a fee of €4.5 million in the summer of 2011, Kolbeinn came through Víkingur Reykjavik's youth program. He then had a brief spell with HK Kópavogur in his home country and moved on to AZ Alkmaar in the Netherlands.

Before making his debut for the Icelandic national team, Kolbeinn played at under-17, under-19 and under-21 levels. With 26 goals, he is their joint top goalscorer of all-time.