Yuma is a city and county seat in Arizona. It is located in the southwestern corner of the state, near the borders of California and Mexico. It is the county seat of Yuma County and has a population of around 95, 000 people. Yuma is known for its hot summers and mild winters, making it a popular destination for winter visitors. It is also home to the Marine Corps Air Station Yuma, which is the largest military air station in the United States.