Winnebago County Fair 2025 Dates. Pecatonica, w 1st st, pecatonica, il 61063, usa The winnebago county fair association will proudly host the 2025 winnebago county fair from july 31st to august 4th, 2025.


Winnebago County Fair 2025 Dates

October 19th & 20th, 2025 the winnebago county fairgrounds is about celebrating community, friendships, families, and agriculture. Site closes at midnight on june 10th.

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