Hyattville is a census-designated place (CDP) in Big Horn County, Wyoming, United States.

According to the United States Census Bureau, the CDP has a total area of 4.1 square miles (10.6 km2), all land.

31.3% of all households were made up of individuals, and 15.6% had someone living alone who was 65 years of age or older.

There were 11.8% of families and 6.5% of the population living below the poverty line, including no under eighteens and none of those over 64.

Public education in the community of Hyattville is provided by Big Horn County School District #4.