Mikołaj Firlej may refer to several members of the Firlej family:

• Mikołaj Firlej (?-1526), hetman, voiode of Sandomierz (wojewoda sandomierski)
• Mikołaj Firlej (?-1588), voivode of Lublin (wojewoda lubelski)
• Mikołaj Firlej (?-1601), voivode of Kraków (wojewoda krakowski), Grand Marshal of the Crown
• Mikołaj Firlej (1588-1635), voivode of Sandomierz (wojewoda sandomierski)

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