Australia •
John Kerr (governor-general) (1914–1991), Australian governor-general
New Zealand •
John Kerr (Auckland politician), New Zealand politician •
John Kerr (Nelson politician) (1830–1898), New Zealand politician
United Kingdom •
John Kerr, 7th Marquess of Lothian (1794–1841), Scottish politician and peer •
John Kerr (British politician) (1852–1925), UK MP for Preston, 1903–1906 •
John Kerr (physicist) (1824-1907), Scottish physicist •
John Henry Kerr (1871–1934), colonial governor in British India •
John Kerr, Baron Kerr of Kinlochard (born 1942), British diplomat
United States •
John Kerr (Ohio politician) (1778–1823), mayor of Columbus, Ohio •
John Leeds Kerr (1780–1844), U.S. senator from Maryland •
John Kerr (Virginia politician) (1782–1842), Virginia politician •
John Bozman Kerr (1809–1878), U.S. representative from Maryland •
John Kerr Jr. (congressman) (1811–1879), North Carolina politician and jurist •
John H. Kerr (1873–1958), North Carolina politician •
John H. Kerr Jr. (1900–1968), North Carolina politician •
John H. Kerr III (1936–2015), North Carolina politician ==Sciences==