Surname Laczko (Laczko 
, Laczkó 
) , across the world, is quite a common cognomen. The last name Laczko is habitual in Eastern Europe, particularly Hungary, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Romania. Very seldom, Laczko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Laczko | Romania, United States, Germany, Slovakia, Hungary |
| Laczkó | United Kingdom, Romania, United States, Slovakia, Hungary |
| július laczko (b. 1938) |
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| guido laczko Swiss ice hockey player (1966-2010), CH (b. 1966) |
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| endre laczko researcher |
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| f. laczko researcher |
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