Fontanelle is a city in Summerset Township, Adair County, Iowa, United States. The population was 676 at the time of the 2020 census. History Fontanelle was platted in 1855, by New York state native James C. Gibbs (1820–1907),Adair County History 1976 who followed the arrival of a transient named Collins. In the summer of that year, Gibbs purchased lots on the northeast of the city square where he constructed a large log cabin. He brought his family there to live. Gibbs ran a hotel out of the log cabin briefly. He died in 1907, aged 86, and is buried with his wife, Phebe, in Fontanelle Cemetery. D. M. Valentine purchased lots immediately to the west of Gibbs', thus becoming the second settler. The city is named for chief Logan Fontanelle of the Omaha tribe, son of the French fur trader Lucien Fontanelle of the American Fur Company and an Omaha tribeswoman. Geography Fontanelle is located at (41.289995, -94.562230). According to the United States Census Bureau, the city has a total area of , all land. The local terrain is rolling with a few ravines near the streams. The east branch of the Nodaway River enters Fontanelle in its northwest quadrant. Demographics 2010 census As of the census of 2010, there were 672 people, 304 households, and 164 families living in the city. The population density was . There were 336 housing units at an average density of . The racial makeup of the city was 99.7% White, 0.1% from other races, and 0.1% from two or more races. Hispanic or Latino of any race were 0.6% of the population. There were 304 households, of which 25.7% had children under the age of 18 living with them, 44.1% were married couples living together, 7.2% had a female householder with no husband present, 2.6% had a male householder with no wife present, and 46.1% were non-families. 41.4% of all households were made up of individuals, and 22.7% had someone living alone who was 65 years of age or older. The average household size was 2.11 and the average family size was 2.89. The median age in the city was 48.2 years. 22.2% of residents were under the age of 18; 3.8% were between the ages of 18 and 24; 20.2% were from 25 to 44; 27.4% were from 45 to 64; and 26.3% were 65 years of age or older. The gender