Blood tax may refer to:

• The Devşirme of the Ottoman Empire
• The Formosa blood tax instituted by Hans Putmans

• New York State Route 481
• New York State Route 48 (1920s)
• New York State Route 488
• New York State Route 49
• New York State Route 49 (1920s)
• New York State Route 49 (1927)
• New York State Route 49 (1930)
• New York State Route 495
• New York State Route 50
• New York State Route 50 (1920s)
• New York State Route 51
• New York State Route 51 (1920s)
• New York State Route 51 (1930)
• New York State Route 5 (1924)
• New York State Route 5 (1927)
• New York State Route 5 (1930)
• New York State Route 52
• New York State Route 52 (1920s)
• New York State Route 52 (1930)
• New York State Route 52A
• New York State Route 52 Business
• New York State Route 53
• New York State Route 531
• New York State Route 53 (1920s)
• New York State Route 54