Dennison may refer to:

In the United States

• Dennison, Illinois
• Dennison, Minnesota
• Dennison, Ohio
• Dennison Township, Luzerne County, Pennsylvania

• Dennison (surname)
• Dennison Manufacturing Company

• Avery Dennison Corporation, formed from the merger of Dennison and Avery
• Dennison Architects Limited, an Irish Architectural Firm specialising in Low-Energy buildings
• Dennison Limited, an Irish truck and trailer manufacturer
• Dennison's, a brand of chili manufactured by ConAgra Foods
• Denison (disambiguation)