John Thomas Loughran (February 23, 1889 in Kingston, Ulster County, New York – March 31, 1953 in Kingston, Ulster County, New York) was an American lawyer and politician.
On May 21, 1934, he was appointed to the New York Court of Appeals to fill the vacancy caused by the resignation of Henry T. Kellogg.
In November 1934, he was elected on the Democratic and Republican tickets to a full 14-year term.
In September 1945, after the death of Irving Lehman, Loughran was appointed Chief Judge of the Court of Appeals.
In November 1946, he was re-elected unopposed to a 14-year term as Chief Judge, and died in office.