Joseph Napier may refer to:
- Sir Joseph Napier, 1st Baronet (1804–1882), Irish member of parliament in the United Kingdom Parliament and subsequently Lord Chancellor of Ireland
- Sir Joseph Napier, 2nd Baronet (1841–1884), Irish officer in the British Army
- Sir Joseph Napier, 4th Baronet (1895–1986), British baronet and soldier
- Joseph Napier (USCG), namesake of the USCGC Joseph Napier
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