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.