Rafter J Ranch is a census-designated place (CDP) in Teton County, Wyoming, United States.

[4] According to the United States Census Bureau, the CDP has a total area of 0.7 square mile (1.7 km2), all land.

There were 466 housing units at an average density of 711.0 per square mile (274.5/km2).

16.9% of all households were made up of individuals, and 3.7% had someone living alone who was 65 years of age or older.

Public education in the community of Rafter J Ranch is provided by Teton County School District #1.