Martha Medeiros (born August 20, 1961, in Porto Alegre) is a Brazilian writer and journalist.

She graduated in 1982 at the Pontifical Catholic University of Rio Grande do Sul (PUCRS) in Porto Alegre and became journalist for the newspaper Zero Hora of Porto Alegre and O Globo of Rio de Janeiro.

She moved for nine months in Chile, and she began to write poems.

Coming back to Porto Alegre, she began writing as a journalist also continuing her literary way.

A Morte Devagar (A slow death), one of her poems written in 2000, has for a long time been erroneously attributed to Pablo Neruda.