Newport was platted by Ephraim Freshour and William Coberly. The platting was recorded on June 17, 1837, although the actual platting was done at a much earlier date. In 1851, a steam powered sawmill was built in the community, and the first store was opened in 1854. The Walnut Run Post Office was established on June 27, 1856, with James Gossard as the first postmaster. Historically, the town was called Walnut Run by some people, due to the post office having said name, although the community itself has always been called Newport. The post office was discontinued on December 16, 1859, but then re-established on February 25, 1867. As of 1875, the community contained two churches, two blacksmith shops, one wagon shop, two shoe shops, two grocery stores, and one sawmill. The post office changed its name to Walnutrun Post Office on July 1, 1895, and then discontinued on August 31, 1901. The mail service is currently sent though the London branch.