J & J or J and J may refer to:
- Johnson & Johnson, an American multinational medical devices, pharmaceutical and consumer packaged goods manufacturer
- J & J Snack Foods, an American food and beverage manufacturing and marketing conglomerate
- J & J Ultralights, an American ultralight aircraft manufacturer
- Jaffa–Jerusalem railway, a railroad that connected Jaffa and Jerusalem
- Jamie Noble and Joey Mercury, an American wrestling tag team known as J&J Security
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