Kapteyn may refer to:
*
Jacobus Kapteyn - Astronomer
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Parallactic instrument of Kapteyn - the instrument used by Kapteyn to analyze photographic plates
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Jacobus Kapteyn Telescope - telescope named after Jacobus Kapteyn
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Kapteyn's Star - star named after Jacobus Kapteyn
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Kapteyn (crater) - Lunar crater named after Jacobus Kapteyn
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Kapteyn Astronomical Institute - Dutch Astronomical Institute named after Jacobus Kapteyn
*
Paul Joan George Kapteyn - Dutch Judge
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