Lonoke County is located in the Central Arkansas region of the U.S. state of Arkansas. As of the 2020 census, the population was 74,015, making it the 10th-most populous of Arkansas's 75 counties. The county seat is Lonoke and largest city is Cabot. Lonoke County was formed on April 16, 1873, from Pulaski County and Prairie County, and was named as a corruption of "lone oak", after a large red oak in the area that had been used by a surveyor to lay out the Memphis and Little Rock Railroad.