Ignatius Charles "Iggy" O'Donnell (27 May 1876 – c. 1946) was a rugby union player who represented Australia.
Iggy O'Donnell, a fly-half, was born in Hillston, New South Wales and claimed a total of 2 international rugby caps for Australia.
Like his brother Jack, Iggy captained NSW against Queensland in their Sydney matches in both the 1900 and 1901 seasons and took on the role as the side's goal kicker.
Jack was a rookie in his early twenties and had never appeared in a state match when he packed down against the tourists.
Jack later made 25 appearances for New South Wales, including three against David Bedell-Sivright's British/Irish side in 1904.