Lone Rock is a city in Kossuth County, Iowa, United States.

Long before any settlement took place here, the unusual (175 ton) boulder was used as a landmark for travelers.

[4] According to the United States Census Bureau, the city has a total area of 0.12 square miles (0.31 km2), all land.

[5] Lone Rock is north of Iowa Highway B19 and west of U.S. Route 169.

There were 79 housing units at an average density of 687.2 per square mile (265.3/km2).

There were 82 housing units at an average density of 683.3 per square mile (263.8/km2).

36.0% of all households were made up of individuals, and 20% had someone living alone who was 65 years of age or older.

There were 83 housing units at an average density of 723.4 per square mile (279.3/km2).

42.7% of all households were made up of individuals, and 33.3% had someone living alone who was 65 years of age or older.

About 4.8% of families and 7.4% of the population were below the poverty line, including 17.1% of those under the age of eighteen and 3.6% of those 65 or over.