- Champaign County, Ohio Chamber of Commerce and Visitor's Bureau
- Offers events, chamber benefits, newsletters, member directory, points of interest, and barn quilt tour.
- National Association of Counties: Champaign County, OH
- Features information regarding the county population, elected officials, demographic data, and census facts.
- National Register of Historical Places: Champaign County, Ohio
- Brief description of the historical places in the county. Information about the historic function, signifacance, architectural style, and builder.
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