Union County Airport may refer to:
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Union County Airport (Ohio) in Union County, Ohio, United States (FAA: MRT)
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Union County Airport (South Carolina), also known as Troy Shelton Field, in Union County, South Carolina, United States (FAA: 35A)
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La Grande/Union County Airport, in Union County, Oregon, United States (FAA: LGD)
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New Albany-Union County Airport, in Union County, Mississippi, United States (FAA: M72)
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