• Fruit preserves, called 'jelly', specifically a clear fruit spread
• Gelatin, a translucent substance extracted from the collagen inside animals' connective tissue
• Gelatin dessert, referred to as jelly in the United Kingdom, Ireland and other countries
• Jelly fungus, the class Heterobasidiomycetes
• Jelly shoes, shoes made of a soft plastic, resembling sandals
• Naval jelly, phosphoric acid in a rust removing gel
• Petroleum jelly, a gel used as a topical ointment
• Royal jelly, made by bees and fed to the larvae to turn them into queen bees
• Temazepam, a powerful hypnotic drug, street name "Jellies"
• Jellyfish, also known as jellies
• slang term for Jealous

• Jelly Roll Morton (* 1889–1941), eigentlich Ferdinand Joseph La Menthe, US-amerikanischer Pianist, Komponist und Band-Leader
• Jelly (Kunststoff), Kunststoff aus PVC mit bis zu 30% Weichmachern
• eine Variante des Namens Jelena

※この項目では料理や菓子を中心とした食品のゼリーとそのゲル化剤を主に記述し、その他のゼリー形状を取るものについても触れる。