John Cummins may refer to:

• John Cummins (Australian politician) (born 1944), former member of the South Australian House of Assembly
• John Cummins (Canadian politician) (1942–2025), Canadian politician
• John Cummins (Gaelic footballer) (born 1948), Irish Gaelic footballer
• John Cummins (Irish politician) (born 1988), Irish Fine Gael senator since 2020
• John Cummins (union organiser) (1948–2006), Australian labour leader
• John Adams Cummins (1835–1913), Hawaiian politician
• John D. Cummins (1791–1849), U.S. Representative from Ohio
• John Stephen Cummins (1928–2024), American prelate of the Roman Catholic Church
• John Swete Cummins (1811–1862), Irish-born municipal politician and writer in Canada
• John William Cummins, American Speaker of the West Virginia House of Delegates (1929–1931)

• John R. Cummins Farmhouse (built 1879–1880), American National Register of Historic Places
• John Cummings (disambiguation)
• John Commins (disambiguation)
• Jonathan Cummins, Canadian musician