This is a list of Ig Nobel Prize winners from 1991 to the present day. A parody of the Nobel Prizes, the Ig Nobel Prizes are awarded each year in mid-September, around the time the recipients of the genuine Nobel Prizes are announced, for ten achievements that "first make people laugh, and then make them think". Commenting on the 2006 awards, Marc Abrahams, editor of Annals of Improbable Research and co-sponsor of the awards, said that "[t]he prizes are intended to celebrate the unusual, honor the imaginative, and spur people's interest in science, medicine, and technology". All prizes are awarded for real achievements, except for three in 1991 and one in 1994, due to an erroneous press release.

1991

Apocryphal achievements

The first nomination also featured three fictional recipients for fictional achievements.

1992

1993

1994

No longer officially listed

1995

The ceremony took place on 6 October 1995.

1996

The ceremony took place on 3 October 1996.

1997

The ceremony took place on 9 October 1997.

1998

The ceremony took place on 8 October 1998.

1999

The ceremony took place on 30 September 1999.

2000

The ceremony took place on 5 October 2000.

2001

The ceremony took place on 4 October 2001.

2002

The ceremony took place on 3 October 2002.

2003

The ceremony took place on 2 October 2003.

2004

The ceremony took place on 30 September 2004.

2005

The ceremony took place on 6 October 2005.

2006

The ceremony took place on 5 October 2006.

2007

The ceremony took place on 4 October 2007.

2008

The ceremony took place on 2 October 2008.

2009

The ceremony took place on 1 October 2009.

2010

The ceremony took place on 30 September 2010.

2011

The ceremony took place on 29 September 2011.

2012

The ceremony took place on 20 September 2012.

2013

The ceremony took place on 12 September 2013.

2014

The ceremony took place on 18 September 2014.

2015

The ceremony took place on 17 September 2015.

2016

The ceremony took place on 22 September 2016.

2017

The ceremony took place on 14 September 2017.

2018

The ceremony took place on 13 September 2018.

2019

The ceremony took place on 12 September 2019.

2020

The ceremony took place on 17 September 2020 and was webcast.

2021

The 31st First Annual Ig Nobel Prize ceremony took place on Thursday, 9 September 2021 and was webcast.

2022

The 32nd First Annual Ig Nobel Prize ceremony took place on Thursday, 15 September 2022, and was presented in a webcast format.

2023

The 33rd First Annual Ig Nobel Prize ceremony took place on Thursday, 14 September 2023, and was presented in webcast.

2024

The 34th First Annual Ig Nobel Prize ceremony took place on Thursday, 12 September 2024, and was held at the Massachusetts Institute of Technology.

People who received multiple Ig Nobel Prizes

Ig Nobel Prize winners who also received the Nobel Prize