This is a list of things named after Pierre de Fermat, a French amateur mathematician.

• Fermat–Apollonius circle
• Fermat–Catalan conjecture
• Fermat cubic
• Fermat curve
• Fermat–Euler theorem
• Fermat number
• Fermat point
• Fermat–Weber problem
• Fermat polygonal number theorem
• Fermat polynomial
• Fermat primality test
• Fermat pseudoprime
• Fermat quintic threefold
• Fermat quotient
• Fermat's difference quotient
• Fermat's factorization method
• Fermat's Last Theorem
• Fermat's little theorem
• Fermat's method
• Fermat's method of descent
• Fermat's principle
• Fermat's right triangle theorem
• Fermat's spiral
• Fermat's theorem (stationary points)
• Fermat's theorem on sums of two squares
• Fermat theory
• Pell–Fermat equation
• 12007 Fermat

Other

• Fermat (computer algebra system)
• Fermat (crater)
• Fermat Prize