Hyder is a ghost town and farming community in Yuma County, Arizona, United States. It and surrounding areas (such as "Sentinel" and "Agua Caliente") houses several different types of fish, shrimp, and other types of farms, one school (Sentinel Elementary School), and two gas stations/general markets. There was also a bar at one point (the Whispering Sands Bar), but it was closed some time in 1997 due to a change of ownership and lack of business. The Gila River runs through Hyder, although it is dry most of the time. Hyder is also known for its extremely hot temperatures in the summer.
During World War II it was the training spot of General Patton's desert forces. The nearby Agua Caliente also held a large hotel during this time.