Gladia Delmarre, later known as Gladia Solaria and Gladia Gremionis, is a character from Isaac Asimov's Robot series.

She first appears in the book The Naked Sun, which is set on Solaria, a planet which has ten thousand robots for every human being and where most people cannot tolerate the personal presence of other people. When Gladia's husband is murdered, she is the chief suspect because he would not have allowed anyone else near him. After Elijah Baley solves the murder case, proving that she indeed was the killer though not responsible, Gladia moves to Aurora, as Dr. Han Fastolfe protegeé.

In The Robots of Dawn, Elijah and Gladia meet again, this time on Aurora. They become lovers, and Gladia still has vivid memories of him 160 years after his death (as a Spacer, she has a lifespan of several centuries). In Robots and Empire she became the legal owner of R. Daneel Olivaw and R. Giskard Reventlov after Fastolfe's death. After that, she meets D.G. Baley, a seventh-generation descendant of Elijah, and the two fell in love. and decides to go to Earth and work for peace between Spacers and Settlers.

In Foundation and Earth, one character tells a story to another concerning a Spacer woman who fell in love with a Settler captain, a reference to Gladia.