Linn Grove is a city in Buena Vista County, Iowa, United States.

[2] 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.

There were 92 housing units at an average density of 164.8 per square mile (63.6/km2).

There were 93 housing units at an average density of 160.3 per square mile (61.9/km2).

The racial makeup of the city was 96.8% White, 0.6% African American, and 2.6% from other races.

45.7% of all households were made up of individuals, and 16% had someone living alone who was 65 years of age or older.

There were 99 housing units at an average density of 166.6 per square mile (64.3/km2).

32.6% of all households were made up of individuals, and 14.6% had someone living alone who was 65 years of age or older.

About 3.1% of families and 5.3% of the population were below the poverty line, including none of those under the age of eighteen and 4.2% of those 65 or over.

The local newspaper that covers events and news near Linn Grove is the Peterson Patriot.