The Cat in the Hat is a 1957 book by Dr. Seuss.

The Cat in the Hat may also refer to:

• The Cat in the Hat Comes Back, sequel to the 1957 book
• The Cat in the Hat (TV special)
• The Cat in the Hat (film)
• The Cat in the Hat Knows a Lot About That!, an animated television series
• Cat in the Hat (album), album by go-go band Little Benny & the Masters

• Pollution at Morgan’s Point (Bermuda)
• Pollution contributed climate change
• Pollution control
• Pollution in China
• Pollution market
• Pollution of ganga
• Pollution of the Ganges
• Pollution prevention
• Pollution Prevention
• Pollution prevention program
• Pollution tax
• Pollution Taxes
• Pollution (The Goodies)
• Pollutri
• Pollux (astronomy)
• Pollux b
• Pollux (disambiguation)
• Pollux Gamelabs
• Pollux IV
• Pollux (mountain)
• Polly (1989 film)
• Polly Adler
• Pollyana
• Polly and Her Pals
• Polly and her pals