As of the census[2] of 2000, there were 639 people, 229 households, and 179 families residing in the township.

There were 485 housing units at an average density of 14.1 per square mile (5.4/km2).

18.8% of all households were made up of individuals, and 6.1% had someone living alone who was 65 years of age or older.

Hudson Township is served almost evenly between two separate public school districts.

The western half of the township is served by Boyne Falls Public School District to the west in Boyne Valley Township, while the eastern half of the township is served by Vanderbilt Area Schools to the northeast in the village of Vanderbilt in Otsego County to the east.