In Book 5, Ovid puts a Roman spin on the Greek myth of Persephone's abduction. Demeter's a main player, of course. You know the story already, but don't get confused by the names. Greeks and Romans did it a little differently, but the story's the same.
The character of Ceres shows up looking for her lost daughter in a play within a play in Shakespeare's The Tempest. Leave it to Shakespeare to get all meta.
This poem by Lord Alfred Tennyson makes us forget that Demeter and Persephone are goddesses. We feel their pain like we would for any human. Now that's poetry.
The goddess of grain shows up to lend a hand to Marvel's ultimate team of superheroes. There's nothing a good farming technique can't handle.
Carol Ann Duffy's short poem gives the story of Demeter and Persephone a more positive spin than we're used to. She puts aside the nastiness of separation and recounts the moment in which Demeter sees her daughter returning from the Underworld; as you can imagine, the goddess of agriculture is happy as can be.
The goddess of agriculture makes a cameo in the Percy Jackson and the Lightning Thief movie (keep an eye out for her when Percy gives the Master Bolt to Zeus).