María Huld Markan Sigfúsdóttir (b. 1980) is a composer and a violinist.
She graduated as a violinist from the Reykjavik College of Music in 2000 and with a Bachelor’s degree in composition from the Iceland Academy of the Arts in 2007.
María is a member of the band amiina from 1999. amiina has released and recorded several albums and performed their music around the world as well as collaborated with various artists.
Maria has been a long time collaborator of Sigur Rós from 2000. Recent work with the band includes orchestration for their album and tour, Átta.

María has composed music for orchestras, various sized ensembles, choir, choreography, visual arts and films.
Maria's compositions have been recorded and released internationally. Clockworking, Sleeping Pendulum, Aequora, Spirals, Loom, Oceans, Clockworking for Orchestra and Kom vinur all have been released on the US label Sono Luminus. Her compositions have been performed in Iceland, USA, Australia and Europe.