Cognomen Martinko (Martinko 
) , in the world, is quite a rare last name. The cognomen Martinko is characteristic of Croatia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Hungary. In absolute terms, the name is most common in Croatia, Slovakia, and the United States. Very seldom, Martinko is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Martinko | Germany, Croatia, Slovakia, United States, Hungary |
| mihael martinko SI (b. 1621) |
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| matej martinko SK (b. 1898) |
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| vladimír martinko SK (b. 1921) |
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| róbert martinko Czechoslovak manager, minister without portfolio, minister of post offices and slovak nation politician, SK (b. 1936) |
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| john m. martinko (b. 1947) |
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| michelle martinko American high school student and murder victim (1961-1979), US (b. 1961) |
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| alexander j martinko researcher |
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| thomas martinko researcher ORCID ID = 0000-0001-5771-4221 |
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