Pierre Grégoire (9 November 1907 – 8 April 1991) was a Luxembourgish politician in the Christian Social People's Party (CSV), journalist, and writer.
Before turning to politics full-time, he wrote for the Luxemburger Wort newspaper.
Before World War II, he organised the development of the CSV's precursor, the Party of the Right, along with Jean Baptiste Esch.
He was a CSV Deputy from 1946 onwards, and was the party's secretary-general from 1952 to 1960.
He also held several government posts: he was the minister for the Interior, Religion, Arts and Sciences and Transport from 1959 to 1964, then became minister for Cultural Affairs, Education and the Civil Service from 1964 onwards.