John Commingers Ainsworth (June 6, 1822 – December 30, 1893) was an American pioneer businessman and steamboat owner in Oregon.

[citation needed] He married a young woman, Josephine Augusta Kendall, who died fifteen months later.

The Gold Rush did not live up to his expectations, so he found a job piloting a steamer on the Willamette River in Oregon.

[1] The OSNC controlled the shipping routes of steamers, railroads, and freight lines in Washington and Oregon.

In 1870, Ainsworth founded the Orient of Oregon and the Valley of Portland of the Ancient and Accepted Scottish Rite, S.J.

[8] His son, John Churchill Ainsworth, (1870-1943) was a prominent Oregon businessman, Portland banker and served as chairman of the State Highway Commission from 1931 to 1932.