Nenahnezad is a census-designated place (CDP) in San Juan County, New Mexico, United States. The population was 726 at the 2000 census. The Navajo place name translates as "Long Upgrade". Nenahnezad is a Chapter community just to the south of Fruitland, between the towns of Farmington and Shiprock. It is part of the Farmington Metropolitan Statistical Area.
According to the United States Census Bureau, the CDP has a total area of 3.6 square miles (9.3 km2), of which, 3.5 square miles (9.1 km2) of it is land and 0.1 square miles (0.26 km2) of it (2.22%) is water. As of the census of 2000, there were 726 people, 193 households, and 154 families residing in the CDP. The population density was 205.6 people per square mile (79.4/km²). There were 231 housing units at an average density of 65.4 per square mile (25.3/km²). The racial makeup of the CDP was 0.69% White, 97.52% Native American, 0.14% Asian, 0.14% from other races, and 1.52% from two or more races. Hispanic or Latino of any race were 1.93% of the population.