Stigler is a city in and county seat of Haskell County, Oklahoma. The population was 2,685 at the time of the 2010 census, down from 2,731 recorded in 2000. At the time of its founding, Newman, later Stigler, was located in Sans Bois County, a part of the Moshulatubbee District of the Choctaw Nation in Indian Territory. A post office was established at Newman, Indian Territory on April 30, 1892. The community was named for Dr. Martin W. Newman, a pioneer and physician.