McIntosh County, Oklahoma  McIntosh County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 20,252. Its county seat is Eufaula. The county is named for an influential Muscogee Creek family, whose members led the migration of the Lower Towns to Indian Territory and served as leaders for generations. It is one of the counties within the jurisdiction of the federally recognized Muscogee (Creek) Nation; a small portion is within the jurisdiction of the Cherokee Nation of Oklahoma. Many archaeological sites in McIntosh County date back to the Archaic period in North America (6000 BC - 1 AD). (Ed. note: the "Encyclopedia of Oklahoma History and Culture" defines this period as written here. The definition differs from that shown by the linked Wikipedia article.) Archaeologists have uncovered six sites since 2003 that predate these. These indigenous peoples predated any of Plains Indians, as well as the tribes that settled in the territory in the 1830s following Indian Removal from the American Southeast. Indigenous people may have made petroglyphs at the Handprint Site before the coming of the earliest European explorers. In 1825, the Creek of the Lower Towns in the territory of present-day Georgia, led by William McIntosh, agreed by the Treaty of Indian Springs with the United States, to exchange their land in Georgia for land in Indian Territory. These Creek were a historic people who had originated in the Southeast and were part of the larger Creek Confederacy for centuries. Much of their new territory was included in what later became McIntosh County. Chief McIntosh was executed in Georgia in 1825 by order of the Creek National Council, which had forbidden such land cessions without agreement by the full council. His descendants and followers of the Lower Towns migrated to Indian Territory. There the Creek repeatedly battled with the Osage, who had historically occupied a large area including this and up through present-day Missouri. In 1836, the Creek established North Fork Town on the Texas Road, about two miles east of present-day Eufaula, Oklahoma. A post office named Micco operated in North Fork Town from 1853 to 1886. This area became part of the Eufaula District of the Creek Nation. Albert Pike, representing the Confederate States of America, signed treaties with the Chickasaw, Choctaw and Creek nations at the beginning of the Civil War. They allied with the Confederacy in the hopes of gaining an Indian state after the war.