Festing is a surname and may be:
- Major-General Edward Robert Festing (1839–1912), Royal Engineer, chemist, and first Director of the Science Museum in London
- Field Marshal Sir Francis Wogan Festing (1902–1976), British field marshal
- Colonel Francis Worgan Festing (1833–1886), British Royal Marines officer
- Heinrich Festing (born 1930), German Catholic bishop (German)
- John Wogan Festing (1837–1902), English clergyman who became Bishop of St Albans
- Fra' Matthew Festing (born 1949), English Grand Master of the Sovereign Military Order of Malta
- Michael Festing, British research scientist
- Michael Christian Festing (1705–1752), English violinist and composer
- Simon Festing, British activist and executive director of the Research Defence Society