According to an article from Kyle Stucker with Fosters, the Rochester Fair will return next year, but it will be a much smaller event.

With four days blocked off on the calendar, the RAMA (Rochester Agricultural and Mechanical Assoc), announced a scaled-down four-day Rochester Fair that is set for September 13-16, 2018.  The Fair, which was always held in September used to run for 10 days.

The 142nd  Rochester Fair did not take place this year, due to the fact RAMA owed hundreds of thousands of dollars debt.