Wall Lake is a city in Sac County, Iowa, United States.

[5] According to the United States Census Bureau, the city has a total area of 1.23 square miles (3.19 km2), all land.

There were 354 housing units at an average density of 309.0 per square mile (119.3/km2).

There were 366 housing units at an average density of 297.6 per square mile (114.9/km2).

32.8% of all households were made up of individuals, and 17.3% had someone living alone who was 65 years of age or older.

There were 338 housing units at an average density of 311.9 per square mile (120.4/km2).

30.1% of all households were made up of individuals, and 20.2% had someone living alone who was 65 years of age or older.

The city is served by the East Sac County Community School District.

[11] It was a part of the Wall Lake Community School District until July 1, 1996, when it merged into the Wall Lake View Auburn School District.