Josiah Quincy
Josiah Quincy may refer to:
- Josiah Quincy I, American merchant, planter, soldier, and politician
- Josiah Quincy II, American lawyer and patriot
- Josiah Quincy III, American educator and political figure, mayor of Boston, 1823–1828
- Josiah Quincy Jr., American politician, mayor of Boston, 1845–1849
- Josiah Quincy (1859–1919), American politician from Massachusetts, mayor of Boston, 1896–1900
- Josiah Quincy (New Hampshire politician), American politician and lawyer in New Hampshire