•
Patrick Campbell (British Army officer, born 1684) (1684–1751), also known as Peter Campbell, British Army general and member of parliament •
Peter Campbell (naval officer) (1780–c. 1832), founded the Uruguayan Navy •
Peter Walter Campbell (1926–2005), gay English Conservative Party libertarian •
Peter J. Campbell (1857–1919), American lawyer and politician •
Peter M. Campbell (1872–1954), member of the Legislative Assembly of Alberta •
Peter Campbell (engineer) (1932–2021), British structural engineer •
Peter Colin Campbell (1810–1876), Scottish clergyman and principal of the University of Aberdeen •
Pete Campbell (born 1934), born Peter Dyckman Campbell, a character played by Vincent Kartheiser in the American TV series
Mad Men