Wis. Stat. § 61.20: Election of trustees; terms; number.

(1) Villages shall have 6 trustees, except as provided otherwise in sub. (3), whose term of office shall be 2 years, 3 of whom shall be elected each year.

(3) Villages having a population of 350 or less shall have 2 trustees, who together with the president shall constitute the village board, a majority of whom shall constitute a quorum. One trustee shall be elected each year for a term of 2 years.

(4) Any village may by ordinance change the number of trustees, but such change in the number of trustees shall not affect the term of office of trustees elected prior to the adoption of such ordinance authorizing such change.