Sena is an unincorporated community and census-designated place in San Miguel County, New Mexico, United States. As of the 2020 census, Sena had a population of 155. It is located along the Pecos River and New Mexico State Highway 3.
Sena was founded in the 19th century.
Sena has no commercial enterprises of its own. The nearest store and Post Office is southeast, in the community of Villanueva.
It is in the West Las Vegas Schools school district. West Las Vegas High School is the area high school.