Surname Colgan (Colgan 
, 寇根 
, Колган 
) , in all the world, is quite a common family name. The last name Colgan is characteristic of Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and the United Kingdom. Measured by absolute frequency, this name is the most popular in the United States, Ireland, and the United Kingdom. Much less frequently, Colgan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Colgan | Australia, Canada, Ireland, United Kingdom, United States |
| 寇根 | China |
| Колган | Kazakhstan, Russia, Ukraine, Belarus |
| קולגן | Israel |
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seán mac colgan Irish Friar Minor and scholar, IE (b. 1592) |
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joseph colgan Irish-born archbishop, IN (b. 1824) |
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nathaniel colgan Irish naturalist, IE (b. 1851) |
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billy colgan American baseball player, US (b. 1862) |
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| john colgan (1840-1916), US (b. 1840) |
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| arthur j. colgan American politician, US (b. 1856) |
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charles j. colgan politician (1926-2017), US (b. 1926) |
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| charlie colgan Australian rules footballer, AU (b. 1878) |
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stevyn colgan British artist and writer, GB (b. 1961) |
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| gerard g. colgan (b. 1907) |
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nick colgan Irish footballer, IE (b. 1973) |
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jacob colgan American singer-songwriter |
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| bill colgan (b. 1920) |
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| eileen colgan Irish actress, IE (b. 1934) |
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| michael colgan Optimum sports nutricion Colgan en español (b. 1939) |
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