Stephen Tyng Hopkins (March 25, 1849 – March 31, 1892) was a U.S. Representative from New York.
Born in New York City, Hopkins attended the Anthon Grammar School and became an iron merchant and broker.
He later moved to Catskill, and was connected with several coal and iron syndicates in West Virginia and Tennessee.
Hopkins served in the New York Militia, and was Adjutant of New York's 86th Infantry Regiment.
In 1871, Hopkins married Mary Warner Munn, (died January 28, 1887). Their children included Louis Davis Hopkins (born January 24, 1874), a New York City businessman.
A Republican, he was a member of the New York State Assembly (Greene County) in 1885 and 1886. As an Assemblyman he was identified with the Stalwart Republicans, and was accused of using some of his children's inheritance to buy legislators' votes for Levi P. Morton during the 1887 election to succeed Warner Miller.
Hopkins was elected to the Fiftieth Congress (March 4, 1887 – March 3, 1889). During his congressional term, there were reports that he was behaving erratically, and observers presumed that he was mentally ill or drinking excessively in response to the death of his wife.