Synnes Township was named after a place in Scandinavia.

As of the census[1] of 2000, there were 104 people, 34 households, and 29 families residing in the township.

5.9% of all households were made up of individuals, and 2.9% had someone living alone who was 65 years of age or older.

Males had a median income of $31,042 versus $13,750 for females.

There were no families and 0.9% of the population living below the poverty line, including no under eighteens and none of those over 64.