Although the races for mayor and most city council posts are contested, a few candidates are to move straight to the November general election in Tiffin.
Republican Jim Roberts is running unopposed for Ward 1. Steve Lepard, a Republican, holds the seat and has decided not to run for re-election.
Roberts, a former Seneca County sheriff and head of United Veterans Services, said he decided to run when he noticed the problems facing the city.
"I thought I'd like to help in any way I can," he said.
In Ward 3, Republican Paulette Miller is not opposed in the primary. The secretary of the Republican Central Committee, Miller is running on a platform of fiscal responsibility and reducing government.
"I think we have some young people on council doing the right things as far as being fiscally responsible," she said. "I think it would be great if there were more people helping them."
Democrats Ralph Monaco and incumbent Lori Ritzler face each other in the primary for Ward 3.
In Ward 4, Democrat Nathan Mowery is unopposed in the primary. Rich Cline, the incumbent, and Dave Hartsel face each other on the Republican ticket.
Incumbent Brent Howard, a Democrat, is running unopposed for law director. He has held the position for four terms.
"I think I have the experience and the interest to continue to be law director," he said.
Non-partisan candidates have until May 2 to file for the election. No non-partisan candidates have been certified by the Seneca County Board of Commissioners at this time.