Middlesex Township voters will decide whether to increase the number of seats on the board of supervisors from three to five.

The Butler County Commissioners, serving as the county election board, on Wednesday approved adding a referendum on the November ballot for Middlesex voters.

The county received a petition signed by 243 Middlesex residents. The minimum number of names that was needed to move the referendum forward was 150, or 5 percent of the 3,008 registered voters in the township.