Ásgeir Örn Hallgrimsson (born 17 February 1984) is an Icelandic former handball player. After starting his career with Haukar, he went on to play several seasons professionally around Europe, including with GOG and TBV Lemgo. He announced his retirement following the 2019–2020 season. Ásgeir played 247 games for the Icelandic national team, scoring 414 goals, and competed with the team at the 2004, 2008, and 2012 Summer Olympics.