Cromwell is a city in Carlton County, Minnesota, United States.

Cromwell was organized in 1891, receiving its name from the Northern Pacific Railway.

55.4% of all households were made up of individuals, and 43.1% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 97.20% White, 0.70% Native American, and 2.10% from two or more races.

36.7% were of Finnish, 21.1% German, 14.7% Norwegian and 6.4% Swedish ancestry according to Census 2000.

35.4% of all households were made up of individuals, and 13.8% had someone living alone who was 65 years of age or older.

There were 15.4% of families and 20.3% of the population living below the poverty line, including 33.3% of under eighteens and 7.9% of those over 64.