Robert Roe Blacker (October 31, 1845 – September 1931) was a Canadian-born American politician and lumber baron.

Robert R. Blacker was born on October 31, 1845, in Brantford, Ontario in Canada.

The firm lasted until 1887, when it was merged into the State Lumber Company, which Blacker served as the secretary and treasurer of.

In 1888, Blacker was elected Manistee mayor, and served for four consecutive terms.

[6] On December 19, 1891, Michigan Secretary of State Daniel E. Soper resigned amid scandal.

[7][8] On December 24, Blacker was appointed by Governor Edwin B. Winans to serve Soper's expired term.

Blacker was elected by a viva voce vote over William F. Knight, under a suspension of the rules.

[13] In December 1900, Blacker, along with Charles J. Canfield, moved from Manistee to Chicago, citing high taxes in Michigan as the reason.