Hillsboro, MO

- Elevation
- 796 ft
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Hillsboro in context.
About Hillsboro
Hillsboro is a city and the county seat of Jefferson County, Missouri, situated southwest of St. Louis. Established in 1839 as Monticello and later renamed to avoid postal conflicts, the community of approximately 3,500 hosts the main campus of Jefferson College and is served by the Hillsboro R-Three School District locally.
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