Owen Cassidy (c.1862 – January 15, 1911 in Watkins, Schuyler County, New York) was an American lawyer and politician from New York.
In 1899, he was a member of the New York State Board of Health.
In 1908, Cassidy was voted down by the 41st senatorial district convention, and ran as an Independent for re-election, but was defeated.
He died on January 15, 1911, at his home in Watkins, after having been ill for years, and "bedridden for the last few months".
This article about a member of the New York State Senate is a stub.