The Clay County Fair is an agricultural fair in Spencer, Iowa, at Clay County Fair & Events Center. The 2026 event takes place Sep 12–20, 2026. It holds a 4.6-star rating from 1,099 Google reviews. Billed as The World's Greatest County Fair since 1917, drawing more than 300,000 guests over nine days each September for entertainment, competition, food, and the largest farm machinery show at any U.S. fair.
Sign up free to search more events like this, save the ones you care about, and get reminders before deadlines.
Get started freeEvent information comes from automated sources and can be incomplete or wrong - Find A Market is a discovery tool, not a source of truth. Always confirm real details directly with the organizer before applying or paying anything.
Run this event? .
See something wrong with this listing? Sign in to report it.