Grenville is a village in Union County, New Mexico, United States.

According to the United States Census Bureau, the village has a total area of 0.6 square miles (1.6 km2), all land.

As of the census[5] of 2000, there were 25 people, 9 households, and 6 families residing in the village.

The population density was 39.8 inhabitants per square mile (15.4/km2).

33.3% of all households were made up of individuals, and 33.3% had someone living alone who was 65 years of age or older.