David McWilliams may refer to:

• David McWilliams (American football) (born 1942), American football coach at the University of Texas and Texas Tech
• David McWilliams (economist) (born 1966), Irish broadcaster and commentator
• David McWilliams (musician) (1945–2002), best known for his song "Days of Pearly Spencer"
• Dave MacWilliams, soccer coach

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