• John L. Holland is a psychologist who developed the RIASEC model (or Holland Codes) for career development (External Link)
• John Holland, 1st Duke of Exeter (1352?–1400), was half-brother to Richard II of England and second husband of Elizabeth Plantagenet, daughter of John of Gaunt.
• John Holland, 2nd Duke of Exeter (1395–1447), was the son of the 1st duke (above) and father of Henry Holland, 3rd Duke of Exeter.
• John Holland, a founder of the Bank of Scotland in 1695, the central bank of the Kingdom of Scotland
• John Philip Holland (1840–1914) designed submarines for the U.S. Navy and Royal Navy.
• John Henry Holland (b. 1929) was a pioneering founder of the optimization methods now known as genetic algorithms.
• John Holland (athlete) (b. 1926), an athlete from New Zealand who won the bronze medal in the 400m hurdles at the 1952 Summer Olympics in Helsinki.
• John Holland (psychic), a U.S. author and professed psychic medium
• John Holland (actor) (1908–1993), a US actor
• John Holland, of Sheffield, a Yorkshire author and journalist, born March 14, 1794, died December 28, 1872.
• John Holland, (footballer) former player with Floriana and Malta National Team
• John Robert Holland, an American lawyer, who took on civil rights cases early in his career, and volunteered to serve as a lawyer to four Guantanamo captives.
• John Joseph Holland, Australian politician.
• John Holland (baseball executive), an American who served as general manager of the Chicago Cubs from 1956 through 1975.

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