The winner of the special election will serve on the Orange County Board of Supervisors until 2022.
District President Stephen R. Sheldon spoke on the opening.
"The District welcomes the opportunity to host a Vote Center for this important election in our county," Sheldon said. "Local elections are critical to the democratic process and are the foundation for making decisions that impact our daily lives. We look forward to playing an important role in the election process by allowing voters to cast their ballots at OCWD.
OCWD Vote Center hours are from 8 a.m. to 8 p.m. on Saturday, Sunday and Monday, and from 7 a.m. to 8 p.m. on Tuesday. OCWD is located at 18700 Ward Street, Fountain Valley.