Carmen Posadas (born August 13, 1953, in Montevideo) is a prize-winning Uruguayan-Spanish author of books for children.

Besides Madrid, she has also lived in many capital cities including Moscow, Buenos Aires, and London where her father was ambassador.

She went to Oxford University but left before graduating when she married Rafael de Cueto.

In 1984, she won the Premio Nacional de Literatura (Spanish prize of literature).

In 1996 she published her first novel, Cinco Moscas Azules (Five Blue Flies) which was one of the most original and successful books of the year.