John Treadway Rich (April 23, 1841 – March 28, 1926) was an American politician serving as a U.S. Representative and the 23rd governor of Michigan.

Rich served in the Michigan Senate from January 1, 1881, until March 21, 1881, when he resigned, having been elected to the United States House of Representatives for the 47th Congress to fill the vacancy caused by the resignation of Omar D. Conger, serving from April 5, 1881, to March 4, 1883.

He later served as State Railroad Commissioner, 1887–1891, and a delegate to the Republican National Conventions in 1884 to elect James G. Blaine and 1892 to re-elect Benjamin Harrison as U.S. president, both of whom lost to Democrat Grover Cleveland.

After leaving office, he served as United States collector of customs at Detroit from February 16, 1898, to January 30, 1906.

Rich died in St. Petersburg, Florida, and is interred at Mount Hope Cemetery of Lapeer, Michigan.