About Union County Fair
Every year, Alcester hosts the Union County Fair, which is a three-day late-July celebration in South Dakota's southeastern corner where the Big Sioux and Missouri rivers meet near the Nebraska and Iowa borders.
Visitor Tips
Alcester is in the corner of South Dakota nearest to Sioux City, Iowa — the Missouri River and the Lewis and Clark route pass through Union County.
What to Expect
Expect livestock judging, 4-H competitions, carnival rides, and the community spirit of a river-country county shaped by agriculture and the Missouri River.
Heading to Union County Fair?
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