John McKusick (December 18, 1815 – October 26, 1900[3]) was an American lumberman, politician, and pioneer who served four terms as a Minnesota state senator from 1863 to 1867.

[3] Born in Cornish, Maine, in 1815, John McKusick received a common school education before traveling to Illinois in 1839.

He was soon remarried to Servia Greely in November 1849, with whom he had children Newton, Chester, and Ella.

[4] From 1863 to 1867, he served four terms as a Minnesota state senator from the 2nd district, representing Chisago, Kanabec, Pine, and Washington County.

[1][5] On February 18, 1887, Servia died, and McKusick once again remarried a few years thereafter, this time to Ella Knapp.