Jean Grenet (12 July 1939 – 23 February 2021) was a French politician. He was a member of the National Assembly of France from 1993 to 1997 and again from 1992 to 2012. He represented the Pyrénées-Atlantiques department. Grenet was a member of the Radical Party. From 1995 to 2014, he was Mayor of Bayonne, Pyrénées-Atlantiques. He was born in Bayonne.