County Fair Guide

Jefferson County Fair

Rigby, Idaho

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2026 Dates

July 19–25, 2026

Duration

4 days

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Size

small

About Jefferson County Fair

The Jefferson County Fair in Rigby celebrates the "Birthplace of Television" — Philo T. Farnsworth, who invented television, was born in Beaver, Utah but demonstrated the first working electronic television in Rigby, Idaho in 1921, and the county's Snake River Plain potato, grain, and dairy farms come together at a fair honoring both agricultural heritage and scientific achievement.

What to Expect

Expect livestock shows, 4-H and FFA competitions, potato and dairy exhibits, local food vendors, and a fair drawing from the greater Rigby area and the Snake River Plain farming families.

Visitor Tips

Rigby's Farnsworth TV and Pioneer Museum celebrates the invention of television. The Snake River Plain's remarkable agricultural productivity — enabled by vast Snake River irrigation projects — makes Jefferson County one of Idaho's most important potato-growing counties. The Teton Range is visible to the east.

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