[3] Lakeside Township was named from its location on Mille Lacs Lake.

As of the census[1] of 2000, there were 495 people, 240 households, and 161 families residing in the township.

There were 579 housing units at an average density of 19.9 per square mile (7.7/km2).

The racial makeup of the township was 98.18% White, 1.01% Native American, 0.40% Asian, 0.20% Pacific Islander, and 0.20% from two or more races.

30.0% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older.