[8] The city was named for Charles Hallock, an American writer.

[11] As of the census of 2010, there were 981 people, 449 households and 256 families living in the city.

There were 549 housing units at an average density of 269.1 per square mile (103.9/km2).

40.5% of all households were made up of individuals, and 23.4% had someone living alone who was 65 years of age or older.

There were 586 housing units at an average density of 280.9 per square mile (108.5/km2).

35.3% of all households were made up of individuals, and 21.2% had someone living alone who was 65 years of age or older.

Hallock was a main filming location in the Coen brothers' 1996 film Fargo, substituting as a fictional version of Brainerd, Minnesota due to Hallock having a better snowfall than Brainerd during production.