Greenville is a city in Clay County, Iowa, United States. The population was 71 in the 2020 census, a decline from 93 in 2000. History The Greenville post office opened in 1871. The town was named for its first postmaster, A. W. Green. Bank robbery of 1901 On November 16, 1901, one Mr. Brown opened the bank in Greenville and discovered that the bank had been robbed. The vault handle had been removed, explosives placed into the opening, and the vault door blown off. Three men were seen later in Spencer, then Webb, and finally Albert City where they were cornered at the depot. A gunfight ensued, during which one of the gunmen was killed. The other two were captured and later sentenced to life terms in Fort Madison, while the dead gunman was buried in an unnamed grave in Fairfield Cemetery in Albert City. Sixty-four empty shells were picked up in the depot after the fight. Geography Greenville is located at (43.016091, -95.145464). According to the United States Census Bureau, the city has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 75 people, 30 households, and 18 families residing in the city. The population density was . There were 34 housing units at an average density of . The racial makeup of the city was 96.0% White and 4.0% Native American. Hispanic or Latino of any race were 2.7% of the population. There were 30 households, of which 30.0% had children under the age of 18 living with them, 56.7% were married couples living together, 3.3% had a female householder with no husband present, and 40.0% were non-families. 30.0% of all households were made up of individuals, and 16.7% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.17. The median age in the city was 36.8 years. 24% of residents were under the age of 18; 9.3% were between the ages of 18 and 24; 26.6% were from 25 to 44; 29.3% were from 45 to 64; and 10.7% were 65 years of age or older. The gender makeup of the city was 49.3% male and 50.7% female. 2000 census As of the census of 2000, there were 93 people, 34 households, and 24 families residing in the city. The population density was