Susan Haack (sündinud 1945 Burnhamis Inglismaal) on inglise filosoof, kes on andnud suure panuse loogikasse, epistemoloogiasse ja metafüüsikasse.

Haack sai hariduse Oxfordis St. Hilda's College'is, kus ta õppis filosoofiat, majandusteadust ja poliitikat. Seejärel omandas ta sealsamas bakalaureusekraadi filosoofias. Doktorikraadi sai ta Cambridge'i New Hallis.

Aastal 1971 hakkas õpetama Warwicki ülikoolis, kus ta on 1976. aastast dotsent ja 1982. aastast professor. Aastal 1990 jätkas Haack õppejõutööd Miami ülikoolis Cooperi õppetoolis, olles kunstide ja teaduste vanemteadur ning filosoofiaprofessor.

• Deviant Logic. Cambridge University Press, 1974.
• Haack, Susan; Kolenda, Konstantin (1977). "Two Fallibilists in Search of the Truth". Proceedings of the Aristotelian Society. 51 (Supplementary Volumes): 63–104. DOI:10.1093/aristoteliansupp/51.1.63. JSTOR 4106816. (Charles Sanders Peirce and Karl Popper have strikingly similar views on the propensity theory of probability and philosophy of science.)
• Philosophy of Logics. Cambridge University Press, 1978.
• Evidence and Inquiry. Blackwell, 1993.
• Deviant Logic, Fuzzy Logic: Beyond the Formalism. The University of Chicago Press, 1996. (Extends the 1974 Deviant Logic, with some additional essays published between 1973 and 1980, particularly on fuzzy logic, cf The Philosophical Review, 107:3, 468–471 [1])
• "Vulgar Rortyism," The New Criterion 16, 1997.
• Manifesto of a Passionate Moderate: Unfashionable Essays. The University of Chicago Press, 1997.
• Defending Science – Within Reason: Between Scientism and Cynicism. Prometheus Books, 2003. ISBN 1-59102-117-0.
• "Trial and Error: The Supreme Court's Philosophy of Science". American Journal of Public Health, 2005.
• Pragmatism, Old and New (Robert Lane, associate editor). Prometheus Books, 2006.
• Putting Philosophy to Work: Inquiry and Its Place in Culture. Prometheus Books, 2008.
• Evidence Matters: Science, Proof and Truth in the Law. Cambridge University Press, 2014.