Clinton F. Irwin (January 1, 1854 – November 4, 1923), an Illinois lawyer of Irish descent, was a justice of the Oklahoma Territory Supreme Court from 1899 to 1907.
Henry Irwin, Jr. was a native of County Antrim, Ireland who had immigrated first to Canada, as a small child with his parents then came to Franklin Grove in 1836, when he was 12 years old, and where he married Ann Elizabeth.
In 1859, the Irwin family moved to Maple Park in Kane County, Illinois.
[1] Ann Elizabeth's father, Thomas McNeal, was born in Bedford County, Pennsylvania of Scots-Irish descent.
While still teaching, he began reading law at the office of W. H. H. Kennedy, but continued to do so alone for the last three years.
[1] He was a lifelong Republican party stalwart, who began holding political offices when he was a supervisor of Virgil, Illinois in 1881–2.
[2] Irwin's position was automatically terminated when the Territory became the state of Oklahoma on March 16, 1907.