Career
Born in Reykjavík, Jónsson began his career with Úrvalsdeild side Breiðablik, based in Kópavogur in 2002. After good performances with Breiðablik in the 2007 season he was signed by the giants of Icelandic football KR before the 2008 season. In March 2010 Jónsson played his first game for Iceland against Mexico, coming on as substitute in 0-0 draw.
On 16 April 2015, Jónsson joined Augnablik Kópavogur.