Rainsville is an unincorporated community located in Mora County, New Mexico, United States. The community is 6.7 miles (10.8 km) east of Mora. Rainsville has a post office with ZIP code 87736, which opened on July 8, 1920. Formerly known as Llano del Coyote, Rainsville took the name of its first postmaster, a Mr. Rains.