Location of Duncan, Oklahoma
It is on U.S. Highway 81.
According to the United States Census Bureau, the city has a total area of 46.0 square miles (119 km2). 38.8 square miles (100 km2) of it is land and 7.2 square miles (19 km2) of it (15.67%) is water.
Duncan is known for crepe myrtle trees, Oklahoma prairie and rich farmland. State lawmakers designated the city as Oklahoma's official "Crepe Myrtle Capital".Oklahoma's grasslands are made up of shortgrass, mixed-grass and tallgrass prairie.The city is part of the Great Plains and has multiple lakes. The city has four lakes.
Duncan receives 34 inches of rain per year, but only five inches of snowfall. The city also receives an average of 241 sunny days per year. It lies 1,128 feet above sea level.
Duncan's buildings listed on the National Register of Historic Places include the Johnson Hotel and Boarding House, the Chrislip House, the Duncan Armory, the Patterson Hospital and the old Duncan library. The downtown area lies between Walnut and Willow avenues, from the railroad tracks to State Highway 81.
Duncan is home to the Chisholm Trail Heritage Center. The Stephens County Historical Museum contains displays and artifacts from the land run and early settlement in the area.
The city holds an annual county fair and top-rated livestock events year round. Other annual events include the Trail Dance Film Festival, Cruizin' the Chisholm Trail Car and Motorcycle Show, the Chisholm Trail Stampede, The Dehydrator bicycle race/ride , Summerfest with the World's Largest Garage Sale and the Western Spirit Celebration