Linn Grove is a city in Buena Vista County, Iowa, United States. The population was 163 at the time of the 2020 census. The nearby Chan-Ya-Ta Site contains the remains of a 1000-year-old prehistoric village, and is on the National Register of Historic Places. History A post office called Linn Grove has been in operation since 1877. Linn Grove was named for a grove of linden trees near the town site. Geography Linn Grove is located at (42.892537, -95.241992). It is situated near the Little Sioux River. According to the United States Census Bureau, the city has a total area of , of which is land and is water. Demographics 2010 census As of the census of 2010, there were 154 people, 81 households, and 42 families residing in the city. The population density was . There were 93 housing units at an average density of . The racial makeup of the city was 96.8% White, 0.6% African American, and 2.6% from other races. Hispanic or Latino of any race were 8.4% of the population. There were 81 households, of which 17.3% had children under the age of 18 living with them, 44.4% were married couples living together, 2.5% had a female householder with no husband present, 4.9% had a male householder with no wife present, and 48.1% were non-families. 45.7% of all households were made up of individuals, and 16% had someone living alone who was 65 years of age or older. The average household size was 1.90 and the average family size was 2.67. The median age in the city was 51.7 years. 16.9% of residents were under the age of 18; 4.5% were between the ages of 18 and 24; 12.9% were from 25 to 44; 48.6% were from 45 to 64; and 16.9% were 65 years of age or older. The gender makeup of the city was 48.1% male and 51.9% female. 2000 census As of the census of 2000, there were 211 people, 89 households, and 56 families residing in the city. The population density was . There were 99 housing units at an average density of . The racial makeup of the city was 91.47% White, 8.53% from other races. Hispanic or Latino of any race were 8.53% of the population. There were 89 households, out of which 27.0% had children under the age of 18 living with them, 49.4% were married couples living