Joseph Gustave Desmazes (16 November 1806 – 22 September 1882) was a French naval commissioner who was Senator of Martinique from 1876 to 1882.

Joseph Gustave Desmazes was born in Saint-Pierre, Martinique, on 16 November 1806.

[5] Desmazes was made a Knight of the Legion of Honour in 1848, Officer on 18 September 1860 and Commander on 4 January 1870.

He became a municipal councilor at Fort-de-France, and president of the General Council of Martinique, where he represented the canton of Mouillage.

He was reelected in the triennial renewal of 5 January 1879 by 37 of 43 votes, and again sat with the Republicans in the senate.