Numa is a city in Appanoose County, Iowa, United States. The population was 68 in the 2020 census, a decline from 109 in 2000. Geography Numa's longitude and latitude coordinates in decimal form are 40.685566, −92.978596. According to the United States Census Bureau, the city has a total area of , all land. History Numa was laid out in 1871. In 1907, fire destroyed the surface equipment of the Numa Block mine, then the most productive mine in the county. The Numa Block shaft was deep, giving access to a coal seam. The Numa Block Coal Company also owned mines in Seymour, (about to the west). In 1912, Local 875 of the United Mine Workers, based in Numa, had 392 members. The original Numa Block mine was closed in 1915, after having undermined . In 1911, the Numa Block Coal Company started a new mine, about a mile east of Numa. When fully developed, this mine employed 155 men, hoisting 300 tons of coal daily to ship 175 carloads of coal monthly. A new company town, Martinstown, was platted around this mine in 1913. The approximately 40 houses in Martinstown were frequently known as Shantytown. The mine closed in 1937, after undermining . Aside from the blackened remains of the Martinstown slag pile, little remains of this mine today. In 1914, the Numa Block Coal Company produced over 100,000 tons of coal, ranking among the top 24 coal producers in the state. Demographics 2010 census As of the census of 2010, there were 92 people, 44 households, and 26 families living in the city. The population density was . There were 52 housing units at an average density of . The racial makeup of the city was 100.0% White. There were 44 households, of which 22.7% had children under the age of 18 living with them, 36.4% were married couples living together, 9.1% had a female householder with no husband present, 13.6% had a male householder with no wife present, and 40.9% were non-families. 34.1% of all households were made up of individuals, and 18.1% had someone living alone who was 65 years of age or older. The average household size was 2.09 and the average family size was 2.58. The median age in the city was 47 years. 15.2% of residents were under the age of 18; 7.6% were between the ages of 18 and 24; 23.9% were from