Wonderland is a realm featured on ABC's Once Upon a Time and Once Upon a Time in Wonderland.
- Red Queen/White Queen (ruler)
- White King (ruler)
- Queen of Hearts (previously; ruler)
- Cheshire Cat
- Red King
- White Rabbit
- White Knight
- The Dormouse
- Tweedledee and Tweedledum
- Mock Turtle
- Mome Rath
- Wonderland is based on the worlds Alice travelled to in Alice's Adventures in Wonderland and
Through the Looking-Glass.
- Some of the food and drink in Wonderland alters peoples' sizes.
- Wonderland seems to be a hated place. Jefferson, Rumplestiltskin and Will Scarlet all express their annoyance and/or hatred towards Wonderland at some point.
- S1, E17: "Hat Trick" (flashback)
- S2, E09: "Queen of Hearts" (flashback)
- S5, E12: "Souls of the Departed" (flashback)
- S6, E22: "The Final Battle, Part Two"
- W, E01: "Down the Rabbit Hole"
- W, E02: "Trust Me"
- W, E03: "Forget Me Not"
- W, E04: "The Serpent"
- W, E05: "Heart of Stone"
- W, E06: "Who's Alice?"
- W, E07: "Bad Blood"
- W, E08: "Home"
- W, E09: "Nothing to Fear"
- W, E10: "Dirty Little Secrets"
- W, E11: "Heart of the Matter"
- W, E12: "To Catch A Thief"
- W, E13: "And They Lived"