Jean Haudry (born 28 May 1934) is a French distinguished linguist, Indo-Europeanist, and Identitarian/nationalist activist.
Haudry's L'Indo-Européen, published in 1979, remains the reference introduction to the Proto-Indo-European language written in French.
In 1980, he co-founded with other GRECE members the "Institute of Indo-European Studies" (IEIE) at the Jean Moulin University Lyon 3. Soon after Jean Haudry's retirement, the French Ministry of Education appointed a commission to investigate whether Haudry's institute was not too closely associated with the "far-right". The work of the commission was mooted when Haudry's successor dissolved the institute and reconstituted it as an association free from state supervision.