During the US-Dakota War of 1862 the entire population of township was abandoned.

[4] Soon after the war the end of the war John Workman, one of the Little Falls first settlers, selected the name for the township which was named for Culdrum Townland in County Londonderry, his native town in Ireland.

As of the census[1] of 2000, there were 505 people, 165 households, and 130 families residing in the township.

There were 178 housing units at an average density of 5.3 per square mile (2.0/km2).

18.8% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older.