Exline is a city in Appanoose County, Iowa, United States. The population was 160 in the 2020 census, a decline from 191 in 2000. History Exline was surveyed by J.J. Hall in 1873 for David Exline, who settled there and established a successful dry-goods business, and it was incorporated in 1904. Initially, the town was known as Caldwell City or Bob Town. The opening of a post office in 1877 forced the town to settle on an official name. Exline grew considerably with the coal boom. United Mine Workers local 812 was organized in Exline in 1899; by 1907, it had 200 members. In 1912, Local 812 had 180 members. In 1906, Exline was home to the Exline Coal Company, with two mine shafts west of town, the Iowa Block Coal Company also had an Exline mine, the White Oak Coal Company had a mine north of town, and the inactive Royal Mine was to the east. Geography Exline's longitude and latitude coordinatesin decimal form are 40.649922, −92.840059. According to the United States Census Bureau, the city has a total area of , all land. Geologists have named the Exline cyclothem after the town. This rock group extends from Iowa into Illinois and contains the Exline limestone, named after the exposure on a creek bank, 1.5 miles south of the southwest corner of Exline. Demographics 2010 census As of the census of 2010, there were 160 people, 74 households, and 45 families living in the city. The population density was . There were 85 housing units at an average density of . The racial makeup of the city was 99.4% White and 0.6% from other races. Hispanic or Latino of any race were 3.1% of the population. There were 74 households, of which 24.3% had children under the age of 18 living with them, 47.3% were married couples living together, 9.5% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 39.2% were non-families. 33.8% of all households were made up of individuals, and 20.3% had someone living alone who was 65 years of age or older. The average household size was 2.16 and the average family size was 2.73. The median age in the city was 52.3 years. 19.4% of residents were under the age of 18; 3.8% were between the ages of 18 and 24; 20.1% were from 25 to