The 4th constituency of Charente-Maritime (French: Quatrième circonscription de la Charente-Maritime) is one of five electoral districts in the department of Charente-Maritime, each of which returns one deputy to the French National Assembly in elections using the two-round system, with a run-off if no candidate receives more than 50% of the vote in the first round.

The constituency is made up of 11 whole (pre-2015) cantons – those of Archiac, Cozes, Gémozac, Jonzac, Mirambeau, Montendre, Montguyon, Montlieu-la-Garde, Pons, Royan-Est, and Saint-Genis-de-Saintonge – plus two communes (Colombiers and La Jard) belonging to a twelfth: that of Saintes-Est.

At the time of the 1999 census (which was the basis for the most recent redrawing of constituency boundaries, carried out in 2010) the 4th constituency had a total population of 101,987.

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