Siiri Nordin (born 15 October 1980 in Helsinki) is a Finnish singer. She was the lead singer of the now defunct Finnish rock band Killer. In 2003, Nordin had a hit on her own with the song "Sydämeni osuman sai", included on the soundtrack of the movie Helmiä ja sikoja. The song is a cover version of the Gene Pitney hit song "Something's Gotten Hold of My Heart".

In 2004, Nordin took a break from music and took up boat carpentry. She entered a civil union with her girlfriend, Mirja, in the autumn.

In April 2006, she released a solo album called Me Too, released by the Finnish label, Next Big Thing. In March 2008, she released the Finnish-language album Lyö Tahtia.