Naimark is a surname. Notable persons with the surname include:

• Arnold Naimark, Canadian physician, academic and university administrator
• Mark Naimark, Soviet mathematician
• Michael Naimark, American media artist
• Norman Naimark, American historian

• Naimark's problem, a question in the field of functional analysis
• Naimark's dilation theorem
• Gelfand–Naimark theorem
• Gelfand–Naimark–Segal construction
• Neumark (surname)