Adair County Courthouse may refer to:

• Adair County Courthouse (Iowa), in Greenfield, listed on the National Register of Historic Places (NRHP)
• Adair County Courthouse (Columbia, Kentucky), NRHP-listed
• Adair County Courthouse (Missouri), in Kirksville, NRHP-listed
• Adair County Courthouse (Oklahoma), in Stilwell, NRHP-listed

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