James Lonsdale

James Lonsdale may refer to:
 * James Lonsdale (Irish politician) (1865–1921), Unionist member of the British Parliament from Ireland (now Northern Ireland)
 * James Lonsdale (painter) (1777–1839), fashionable and prolific English portrait painter
 * James John Lonsdale (1810–1886), English judge, writer and secretary to the Criminal Law Commission
 * James Lowther, 1st Earl of Lonsdale (1736–1802), member of the British Parliament from various places in England
 * James Lowther, 7th Earl of Lonsdale (1922–2006), British peer