Surnames
- Sir John Fenwick, 1st Baronet (c. 1570 – c. 1658), English landowner
- Sir John Fenwick, 3rd Baronet (1645–1697), English conspirator
- John Fenwick (Quaker) (1618 – 1683), founder of Salem, New Jersey
- Eliza Fenwick (1766–1840), English author
- Edward Fenwick (1768–1832), Bishop of Cincinnati, Ohio
- Benedict Joseph Fenwick (1782–1846), the second Roman Catholic Bishop of Boston, Massachusetts
- George Fenwick (1847–1929), New Zealand newspaper proprietor and editor
- Charles Fenwick (1850–1918), British trade unionist and politician
- Irene Fenwick (1887–1936), American stage and silent film actress
- Millicent Fenwick (1910–1992), American politician and diplomat
- Jim Fenwick (born 1934), former Australian professional photographer
- Bobby Fenwick (born 1946), a retired Major League Baseball player
- Alistair Fenwick (born 1951), retired British auto racing driver
- Steve Fenwick (born 1951), former Wales international rugby union and league player
- Terry Fenwick (born 1959), former England international footballer
- Perry Fenwick (born 1962), British actor
- Paul Fenwick (born 1969), a retired Canadian international association football player
- Peter Fenwick (politician) (born 1944), Canadian politician
- Peter Fenwick (neuropsychologist), neuropsychiatrist and neurophysiologist
- Ray Fenwick, guitarist and session musician
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