Surname Geoghan (乔根 
, Geoghan 
) , worldwide, is a rare family name. The last name Geoghan is characteristic of Ireland, where it is a rare surname, New Zealand, and the United States. Not in comparison with a country's population, it is the most numerous in the United States, China, and the United Kingdom. Likewise, Geoghan is the forename as well as the last name.
| john joseph geoghan Roman catholic priest and academic, US (b. 1874) |
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| john geoghan catholic priest from Massachusetts, US (b. 1935) |
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| jim geoghan American television producer, US (b. 1953) |
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| lisa geoghan English actress (b. 1967) |
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| walt geoghan college basketball player (1948–1948) St. John's (NY) |
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