Klimczak may refer to:

• Krystyna Klimczak, a Polish figure skater
• Piotr Klimczak, a Polish sprinter
• Sister Karen Klimczak, an American catholic nun, murdered on April 14, 2006

• Jim Tuckwell
• Jim Turner (American football)
• Jim Turner (center)
• Jim Umpleby
• Jim Underdown
• Jim Ursel
• Jim Vandehei
• Jim van der Zee
• Jim Vaughan
• Jim Veitch
• Jim Verdieck
• Jim Vernon
• Jim Vickers
• Jim Vienneau
• Jim V. Roberts
• Jim Walden (lawyer)
• Jim Waldo
• Jim Waldrop
• Jim Walker (rower)
• Jim Walker (Scottish footballer)
• Jim Wallace (Australia)
• Jim Wallace (soldier)
• Jim Wallis (footballer)
• Jim Walls' Police Quest
• Jim Walls' Police Quest (video game series)