Mayor Ben Blake is the incumbent, and is a Democrat.
He is being challenged by Peter Spalthoff, who is running on the Republican ticket, cross endorsed by the Independent Party.
Doors will open at 7:30 p.m. for the 8 p.m. event, sponsored by the Plymouth Men’s Club.
The public is invited at no charge.
Prior to the debate, a diner will be held also at the church beginning at 6:30 p.m. For dinner reservations, $10, call Harry Byrne at 203-874-1870 by Sept. 13.