Per Arvid Ingemar Hedenius (5 April 1908 – 30 April 1982) was a Swedish philosopher. He was Professor of Practical Philosophy at Uppsala University (1947–1973). He was a famous opponent of organised Christianity. The Swedish Humanist Association, known in Sweden as "Humanisterna", offers the Ingemar Hedenius Award each year to support humanist ideas and critical thinking.