Sleepy Hollow is a census-designated place (CDP) in Campbell County, Wyoming, United States.

According to the United States Census Bureau, the CDP has a total area of 0.4 square miles (1.1 km2), all land.

[4] As of the census[3] of 2000, there were 1,177 people, 361 households, and 322 families residing in the CDP.

7.5% of all households were made up of individuals, and 1.1% had someone living alone who was 65 years of age or older.

Public education in the community of Sleepy Hollow is provided by Campbell County School District #1.