McKusick may refer to:
People with the surname McKusick:
- James C. McKusick, author of Green Writing: Romanticism and Ecology
- Marshall Kirk McKusick, computer scientist, brother of James C. McKusick
- Victor A. McKusick, pioneering medical geneticist, twin brother of Vincent McKusick
- Vincent L. McKusick, Chief Justice of Maine, twin brother of Victor McKusick
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