Robert Aaron Dean

Robert Aaron Dean (December 29, 1836 - ?) was a state legislator in Mississippi. He served in the Mississippi House of Representatives and the Mississippi Senate. He represented Lafayette County. He was a Democrat, a Baptist, and a Mason. He married Lucy Ann Langston and had eight children.

He was a delegate at the 1890 Mississippi Constitutional Convention and chaired the penitentiary committee that banned convict leasing.

He was succeeded in the state senate by Lee M. Russell.