Star in Mewni, one of the most prominently featured dimensions in the show.
Dimensions in the series
| Name | First appearance/ mention | Inhabitants | Image |
|---|---|---|---|
| Amethyst Arcade | Party With a Pony | Squares | 
|
| Bad Dog Dimension | Ludo, Where Art Thou? | Unknown | |
| Beachtropolis | The Magic Book of Spells | Unknown | |
| Bounce Lounge | Theme song | Milly Sparkles, assorted interdimensional creatures | 
|
| Bureaucracy of Magic | Page Turner | Magic High Commission, Sean | 
|
| Corinet Dimension | Ludo, Where Art Thou? | Unknown | |
| Crystal Dimension | Crystal Clear | Lekmet, Rhombulus | 
|
| Crystal Fields of Interwoven Continuum | Mathmagic | Omnitraxus Prime | 
|
| Delphinidae | Star and Marco's Guide to Mastering Every Dimension | Dolphins | |
| Desert Dimension | Goblin Dogs | Roy, assorted interdimensional creatures | 
|
| Dimension of Cats with Human Faces | Freeze Day | Cats with human faces | 
|
| Dimension of Wonders and Amazement | Interdimensional Field Trip | Yarn monster | 
|
| Dimension 811 | The Magic Book of Spells | Moss, worms | |
| Dimension 812 | The Magic Book of Spells | Worms | |
| Dimension X-103 | Running with Scissors | Hekapoo | 
|
| Dog Dimension | Fetch | Dogs | |
| Dowager Room | St. Olga's Reform School for Wayward Princesses | Unknown | 
|
| Earth | Theme song | Humans, animals | 
|
| Edible Dimension | Ludo, Where Art Thou? | Unknown | |
| Flendar | Running with Scissors | Unknown | |
| Galafamor | St. Olga's Reform School for Wayward Princesses | Unknown | |
| Great Andromeda | St. Olga's Reform School for Wayward Princesses | Unknown | |
| Jungle Dimension | Theme song | Unknown | 
|
| Mechanical Dimension | Theme song | Robots | 
|
| Mewni | Theme song | Mewmans, monsters | 
|
| Misty Dimension | Ludo, Where Art Thou? | Unknown | |
| Moranth Dimension | Ludo, Where Art Thou? | Unknown | |
| Neverzone | Running with Scissors | Wraiths | 
|
| Pixtopia | Pixtopia | Pixies | 
|
| Plains of Time | Freeze Day | Father Time | 
|
| Quest Buy | Quest Buy | Sloth clerks, Riddle Sphinx, assorted interdimensional creatures | 
|
| Realm of Magic | Toffee | Unicorns | 
|
| Red Dimension | Heinous | Unknown | 
|
| Sandwich Dimension | Storm the Castle | Sandwich monsters | 
|
| Scum Bucket | Party With a Pony | Assorted interdimensional creatures | 
|
| Seabunny Dimension | Theme song | Seabunnies | 
|
| Seventh Dimension | Ludo, Where Art Thou? | Unknown | |
| Sparkle Dimension | Ludo, Where Art Thou? | Unknown | |
| Spatatori | The Magic Book of Spells | Unknown | |
| St. Olga's Reform School for Wayward Princesses | Star Comes to Earth | Miss Heinous, Gemini, princesses | 
|
| Styx Dimension | Ludo, Where Art Thou? | Unknown | |
| Underworld | Theme song | Demons | 
|
| Waterfall Dimension | Ludo, Where Art Thou? | Unknown | |
| Waterfolk Kingdom | Deep Trouble | Waterfolk | |
| Woolandia | Kelly's World | Kelly, Tad, Wooletts | 
|
| Zalla Mountain | St. Olga's Reform School for Wayward Princesses | Unknown | 
|
