John Ross (explorer) (1871-1903), explorer of Central Australia
John Ross (New South Wales politician) (1891-1973), member of the New South Wales Legislative Assembly
John Campbell Ross (1899-2009), at the time of his death Australia's oldest man and the last Australian veteran of the First World War
Jack Ross (Australian footballer) (born 1911), Australian rules footballer
Canada
John Ross (Canadian politician) (1818-1871), Canadian Senator
John Sylvester Ross (1821-1882), miller and political figure in Ontario
John Ross (Nova Scotia politician) (born 1822)
John Jones Ross (1831-1901), Canadian politician from Quebec
J.K.L. Ross (1876-1951), Canadian industrialist
John A. Ross (horse trainer)
New Zealand
Jack Ross (writer) (born 1962), poet and novelist
United Kingdom
John Ross, 1st Lord Ross (died 1501), Scottish nobleman
John Lockhart-Ross (1721-1790), admiral of the British Royal Navy
John Ross (Arctic explorer) (1777-1856), British naval officer
John Ross (British Army officer) (died 1843), Lieutenant Governor of Guernsey
John Ross (VC) (1822-1879), Scottish corporal of the British Army during the Crimean War
John Ross (businessman) (1840-1876), Scottish retail businessman
John Ross (missionary) (1842-1915), Scottish missionary to Northeast China
Sir John Ross, 1st Baronet (1853-1935), Irish barrister, judge and Unionist politician
John Ross (socialist), former Trotskyite and economic advisor to Ken Livingstone
Jack Ross (born 1976), Scottish professional footballer
John Ross (artist), British comic book artist
United States
John Ross (American patriot) (1726-1800), figure in the American Revolution
John Ross (representative) (1770-1834), U.S. Representative from Pennsylvania
John Ross (Cherokee chief) (1790-1866), principal chief of the Cherokee people
John W. Ross (Iowa architect), architect in Davenport, Iowa
John W. Ross (North Dakota architect) (1848-1914), architect in Grand Forks, North Dakota
John William Ross (1878-1925), U.S. federal judge
John Rolly Ross (1899-1963), U.S. federal judge
John Ross (chemist) (born 1926), American physical chemist
John Ross (activist) (1938-2011), American author, journalist, and activist
John R. Ross (born 1938), American linguist
John Andrew Ross (born 1954), Missouri judge and nominee to the United States District Court for the Eastern District of Missouri
John Ross (author) (born 1957), American author of the 1996 novel Unintended Consequences
South Africa
Alias of Charles Rawden Maclean (1815-1880), Stranded in Port Natal 1825-9; walked 600 km to Delagoa Bay to fetch medicines, later a sea captain and opponent of slavery
Ireland
John N. Ross (1920-2011), Irish solicitor and politician
Characters
John Ross (Shannara), in Terry Brooks' Word/Void trilogy