Robert Addison Dague (27 March 1841 – 16 February 1918) was an American politician in Iowa.
Dague was born near Stanton, a town in Morrow County, Ohio, on 27 March 1841.
In 1863, he was made a sergeant in Company G of the 88th Ohio Infantry Regiment and discharged shortly thereafter for health reasons.
He was affiliated with the Republican Party and served a single four-year term for District 6 of the Iowa Senate between 1872 and 1876.
Outside of politics, Dague was a newspaper journalist and editor of the Osceola Sentinel.