Wyarno is an unincorporated community in central Sheridan County, Wyoming, United States.

[3] Public education in the community of Wyarno is provided by Sheridan County School District #2.

Wyarno lies on the high plains about 12.5 miles (20.1 km) south of Montana, in the small Dutch Creek valley.

The town is about 25 miles (40 km) east of the Big Horn Mountains and Bighorn National Forest.

[5] Sheridan Field Station has a cold semi-arid climate (Köppen BSk).