Knatchbull is a surname and may refer to:
- Adrian Knatchbull-Hugessen
- Alexandra Knatchbull
- Dora Knatchbull, married name of Dora Bright (1862–1951), English composer and pianist
- Doreen Knatchbull, Baroness Brabourne
- Edward Knatchbull (disambiguation), various people
- Edward Knatchbull-Hugessen, 1st Baron Brabourne
- John Knatchbull, 7th Baron Brabourne
- Leonora Knatchbull
- Michael Knatchbull
- Michael Knatchbull, 5th Baron Brabourne
- Nicholas Knatchbull
- Norton Knatchbull (disambiguation), various people
- Patricia Knatchbull, 2nd Countess Mountbatten of Burma
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