A series of wildfires burned throughout the U.S. state of Wyoming during 2025.
"Wildfire season" in Wyoming typically occurs between June and September, but wildfires can occur as early as April and late as December. Peak time of fire season is normally in July and August. Wildfires in Wyoming are triggered by a dry climate, drought, grasses die and dry out, and times when dry thunderstorms are more common. Humidity levels, dryness of fuel, wind, and temperature also play a crucial role. Forests that have not had wildfires in recent years have more fire fuel, and trees killed by disease and insect infestation quickly dry up and become a prime fuel for wildfires.
In mid-August, lightning sparked almost twenty wildfires in the Bighorn Basin, including the Red Canyon, Spring Creek, and Sleeper Ranch fires. The Red Canyon Fire has prompted evacuations east of the Wind River Canyon, though no evacuations have been issued from the other fires. Western Wyoming was under a red flag warning, due to very dry and windy conditions, but the fires are not spreading towards highways or towns. While the fires are driven by the dry and windy conditions, they are fueled by the invasive weed, cheatgrass. The area east of Thermopolis on the side of U.S. Route 20 is covered in , which is fueling the Red Canyon Fire and is damaging the native plants.
The following is a list of fires that burned more than , or produced significant structural damage or casualties.