Esther Valentine is a fictional character from the American CBS Daytime soap opera The Young and the Restless.

She had a one night stand with a plumber named "Tiny", with whom she had a daughter, Katherine Tina Valentine, who was only shown a handful of times as a child before emerging as Jabot Cosmetics fashionista, Chloe Mitchell (Elizabeth Hendrickson).

Esther was indirectly responsible for the death of Katherine's husband, Rex Sterling (Quinn Redeker) when she answered a personal ad and met Norman Peterson (Mark Haining), a notorious con man.

Then, not content to wait for Katherine to die to inherit her riches, Rex caught Norman breaking into the estate safe.

Esther then started attempting a normal relationship with her, but Chloe/Kate is frequently embarrassed by her mother's status as a maid and her lack of bashfulness regarding the chosen career.

Shortly thereafter, her granddaughter, Delia was killed in a hit and run by Adam Newman (Michael Muhney, later Justin Hartley and Mark Grossman).

Esther ends up leaving her job at the Chancellor Mansion, unable to deal with Colin, who she claims was making passes at her, though this was never proven.

Tommy Garrett of Canyon News praised Linder's portrayal of Esther when the character was grieving over the loss of Katherine Chancellor in 2008.

Garrett wrote: "She’s bringing the show the much needed and deserved attention it’s been wanting for months with a role that continues getting better by the day."