John Hyde Sweet (usually referred to as J. Hyde Sweet) (September 1, 1880 – April 4, 1964) was an American newspaper publisher Republican Party politician. He was most notable for his brief service as a member of the United States House of Representatives from Nebraska.
After graduating, he worked as court reporter in western Nebraska from 1899 to 1900, and then as a grocer in Nebraska City from 1902 to 1909. After that he served as manager and then editor of the Nebraska City News newspaper and was a Nebraskan delegate to the 1912 Progressive National Convention.
In 1940 was elected as a Republican to the Seventy-sixth United States Congress to fill the vacancy left by the previous representative George H. Heinke, who had died in a car crash in the January of that year. Sweet served for less than a year, and did not run in the following election.