Pétur Hafliði Marteinsson (born 14 July 1973) is a retired Icelandic football player.
He played for Hammarby IF in Sweden, Stabæk in Norway and Stoke City in England during his professional career.
A sought-after defender, Marteinsson was bought by the Norwegian club Stabæk,[2] coached by Anders Linderoth.
In November 2001, he moved on to English club Stoke City,[3] joining up with a number of fellow Icelandic players.
Marteinsson made 18 league appearances for Stoke scoring twice against Bradford City in 2002 before being released in September 2003.