The surname Myhill may refer to:

• Boaz Myhill (born 1982), American-born Welsh footballer
• John Myhill (1923—1987), British mathematician
• Kirby Myhill (born 1992), Welsh rugby union player

In mathematics and theoretical computer science, the name appears also in:

• Myhill congruence
• Myhill's constructive set theory
• Myhill graph
• Myhill isomorphism theorem
• Myhill–Nerode theorem
• Myhill's property
• Rice-Myhill-Shapiro theorem