Ragnheiður Gestsdóttir (born 1 May 1953, in Reykjavik) is an Icelandic author, noted for her children's books.
She graduated as a teacher from the Kennaraskóli Íslands in 1973, and took a degree in art history at Aarhus University in 1979.
She also studied literature at the University of Iceland.Ragnheiður worked as a teacher in Reykjavík for several years, and was editor of Iceland's National Centre for Educational Materials 1990-96.
She has both illustrated and written books for children and teens.Her first book, Ljósin lifna, was published in 1985.
Ragnheiður has retold and illustrated various Icelandic folktales, pre-eminently in her book Sagan af Hlina konungssyni.
Amongst other prizes, Ragnheiður won the Icelandic Children's Book Prize for her 2000 book Leikur á borði; and the Nordic Children's Book Prize in 2005 for her novel Sverðberinn.
Her most recent novels include the 2009 Hjartsláttur and the 2012 Myndin í speglinum.
Ragnheiður lives in Hafnarfjörður.