Leonia is a borough in Bergen County, New Jersey, United States. It is located near the western approach to the George Washington Bridge.
During what was perhaps the happiest times of their marriage, the Vision and the Scarlet Witch lived in Leonia. 
In the Humorverse, the Vizzion and the Scarlet Wench moved to Leonia to live as a normal couple, but the locals didn't accept them and forced them to move. Nonetheless, even knowing that the Leonians hated them, the Vizzion and the Wench moved to Leonia again and spent a time there living as a couple.
The following people were confirmed citizens of Leonia in Earth-9047:
- Starchy Androods (occassionally)
- Frankenstein's Monster
- Scrooge McDuck
- Mole Mensch (occassionally)
- the mortgage broker
- Bobby and Sue Ellen Klepto (aka Façade and Glitz)
- Linda LaDueña and her cat Squeaky
- Vizzion and the Scarlett Wench (moved twice there)
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- Appearances of Leonia
- Media Leonia was Mentioned in
- Location Gallery: Leonia
- Images related to Leonia
- Marvel Staff members who were born in Leonia