Adirondack may refer to several articles:

• Adirondack Mountains in northeastern New York, USA (also known as Adirondacks).
• Adirondack chair, a type of chair.
• Adirondack (Amtrak), an Amtrak route in the United States.
• Adirondack (Mars), the nickname for a small rock on the planet Mars examined by MER-A in 2004.
• Adirondack Community College in Queensbury, New York.