Colonel Darby Bergin (September 7, 1826 – October 22, 1896) was an Ontario physician and political figure.

He opposed the Canada Temperance Act of 1878, feeling that, in the end, it increased, rather than prevented, the consumption of alcohol.

With Joseph Kerr, he promoted the development of the Ontario Pacific Railway, serving as president from 1886 until his death in 1896, when his brother John succeeded him.

In 1862 during the Trent Affair, he raised and commanded the 1st Cornwall Rifle Company, which served on active duty as No.

On October 22, 1896, Darby Bergin died in Cornwall while still in office after succumbing to an unidentified illness.