From Ancestry.com Wiki
Waterville is a town in Lamoille county, Vermont. It was formed in 1824 in Vt. from Franklin county. The probate and court district for Waterville is Lamoille. For more information, contact the town at P.O. Box 31, Waterville 05492. On the attached map, Waterville is shown as 3 in Lamoille county.
For information about the state of Vermont see Vermont Family History Research.