Leavenworth County Fair 2025. 2025 edition of leavenworth county fair will be held at leavenworth county fairgrounds, tonganoxie starting on 29th july. The leavenworth county fair is open from july 30 to august 3 2024the dates of july 29 to august.

Producer days is march 1, 2025 and goat jr. The leavenworth county fair brings family fun to tonganoxie every july!!!