The Weldon Hotel is a historic hotel at 54 High Street in Greenfield, Massachusetts. It was one of the first poured concrete buildings in the United States.
The first part of the five story concrete and stucco building was built in 1905 as an apartment house, but was converted into a hotel in 1907. F. O. Wells, the proprietor, was thought to be overly ambitious in operating such a large hotel, but his business eventually improved in the 1910s. It is said the name "Weldon" comes as a contraction of "Well Done". In 1914 Wells added a dining room on the north side of the building, and in 1927 added sixty rooms above that addition. The business benefited from tourist traffic along the Mohawk Trail. When this went into decline, the hotel also declined, and closed in 1977. The building has since been converted into a senior living facility.