Katja Johanna Alice Nyberg (born 24 August 1979) is a naturalized Norwegian former handball player.

[4] Nyberg played sports from an early age, mainly javelin throw and other athletics varieties.

[13] Katja Nyberg gained Norwegian citizenship on 16 January 2001[14] and made her debut with the national team on 23 March 2001 against France.

She was not allowed to play for Norway in official tournaments until 2002[15] because she had competed at the 1999 Junior World Championship qualification for Finland.

Her first major competition as a Norwegian player was the 2002 European Championship where Norway received a silver medal.

[17] Apart from this individual recognition, one of her biggest achievements with the national team to date was winning the gold medal at the 2008 Summer Olympics.