Rassemblement du peuple français
Bayrou was a member of the National Assembly from 1946 to 1958, representing the Gabon-Moyen-Congo constituency. During his tenure as a deputy, Bayrou was successively affiliated with the Democratic and Socialist Union of the Resistance, the Rally of the French People, and the National Centre of Social Republicans. He served on the Senate between 1959 and 1977. As a senator, he held the Seine seat until the department's dissolution, and represented Paris afterwards. In the Senate, Bayrou was affiliated with the Union of Democrats for the Republic and the Rally for the Republic.