Bad science may refer to:

• Antiscience
• Cargo cult science
• Fabrication (science)
• Fringe science
• Junk science
• Pathological science
• Pseudoscience
• Publication bias
• Scientific misconduct
• The "Bad Science" column by Ben Goldacre in The Guardian
• Bad Science (Goldacre book), a 2008 book by Ben Goldacre
• Bad Science (Taubes book), a 1993 book by Gary Taubes