Vilborg Yrsa Sigurðardóttir (born in 1963) is an Icelandic writer of both crime novels and children's fiction.

Her début crime novel was translated into English by Bernard Scudder.

The central character in her crime novels so far is Thóra Gudmundsdóttir (Þóra Guðmundsdóttir), a lawyer.

Yrsa is married with two children, and she has a career as a civil engineer.

[2] Two of her books have been adapted into Icelandic films, both starring Jóhannes Haukur Jóhannesson.