Mount Dora is an unincorporated community located in Union County, New Mexico, United States. The community is located along U.S. routes 64 and 87, 17.6 miles west-northwest of Clayton. Mount Dora had its own post office from April 10, 1908, until November 2, 2002. It was named Mount Dora by Senator Stephen W. Dorsey after his sister-in-law.