Teresa Duffy

{{short description|Irish long-distance runner}}

{{Use dmy dates|date=April 2022}}

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Teresa Duffy (born 16 July 1969){{Cite web|title=Teresa Duffy|url=https://worldathletics.org/athletes/ireland/teresa-duffy-14283202|access-date=23 June 2020|website=World Athletics}} is an Irish long-distance runner. In 2001, she competed in the women's marathon at the 2001 World Championships in Athletics held in Edmonton, Alberta, Canada.{{Cite web|title=Women's marathon|url=http://www2.iaaf.org/WCH01/Results/data/W/MAR/Rf.html|url-status=dead|archive-url=https://web.archive.org/web/20051202062457/http://www2.iaaf.org/WCH01/Results/data/W/MAR/Rf.html|archive-date=2 December 2005|access-date=25 July 2020|website=2001 World Championships in Athletics}} She finished in 39th place.