Arnór Sveinn Aðalsteinsson (born 26 January 1986) is an Icelandic football player,[1][2] currently playing for Icelandic football club Breiðablik.

Arnór made his debut for Breiðablik in 2004 in 1. deild karla.

He was a key member of Breiðablik's 2010 Úrvalsdeild karla championship team.

[3] In November 2016, Arnór Sveinn joined Úrvalsdeild rivals KR.

[5] Statistics accurate as of match played 4 August 2013[6][7][8] Arnór made his international debut in a friendly match away against Iran in November 2009, coming on as a sub at half time.