John Wilford Blackstone Jr. (December 22, 1835 – October 22, 1911)[1] was an American farmer, lawyer, politician, and judge.

A Republican, he represented Lafayette County for one term each in the Wisconsin State Senate and Assembly.

Born in White Oak Springs (then part of the Michigan Territory) Blackstone read law with John K. Williams and was admitted to the State Bar of Wisconsin in 1861.

[2][3] His father was John Wilford Blackstone, Sr., one of the early pioneers of Lafayette County, who served in the Wisconsin Territorial Legislature and was a judge for Iowa County during the time it was organized under the Michigan Territory.

[2][4] John W. Blackstone Jr. married Ellen E. Hardy, of Platteville, Wisconsin, on June 20, 1862.