Gillett Grove is a city in Clay County, Iowa, United States. The population was 30 in the 2020 census, a decline from 55 in 2000. History Gillett Grove was laid out in 1899 when the railroad was extended to that point. The city was named for brothers George and Isaiah Gillett, pioneer settlers. Geography Gillett Grove's longitude and latitude coordinatesin decimal form are 43.014514, -95.036576. 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 49 people, 24 households, and 12 families residing in the city. The population density was . There were 30 housing units at an average density of . The racial makeup of the city was 98.0% White and 2.0% from two or more races. There were 24 households, of which 20.8% had children under the age of 18 living with them, 25.0% were married couples living together, 16.7% had a female householder with no husband present, 8.3% had a male householder with no wife present, and 50.0% were non-families. 41.7% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older. The average household size was 2.04 and the average family size was 2.75. The median age in the city was 43.3 years. 20.4% of residents were under the age of 18; 12.3% were between the ages of 18 and 24; 20.3% were from 25 to 44; 26.6% were from 45 to 64; and 20.4% were 65 years of age or older. The gender makeup of the city was 51.0% male and 49.0% female. 2000 census As of the census of 2000, there were 55 people, 28 households, and 19 families residing in the city. The population density was . There were 30 housing units at an average density of . The racial makeup of the city was 98.18% White, and 1.82% from two or more races. There were 28 households, out of which 32.1% had children under the age of 18 living with them, 46.4% were married couples living together, 10.7% had a female householder with no husband present, and 32.1% were non-families. 32.1% of all households were made up of individuals, and 10.7% had someone living alone who was 65 years of age or older. The average household size was 1.96 and the average family