Admiral Sir James Hanway Plumridge, KCB, MP (c. 1788 – 29 November 1863) was a British naval officer whose career extended from Trafalgar to the Crimean War, and a Liberal Party Member of Parliament (MP). At the 1837 general election he stood unsuccessfully for Parliament in the Penryn and Falmouth, but he won the seat in 1841. He did not seek re-election at the 1847 general election. His maternal niece Catherine German married Hermann Philip Rée and their great-great-great-grandson is Rt.Hon David Cameron MP.